News: Mechanics and Maritime Sciences related to Chalmers University of TechnologyThu, 28 Jun 2018 08:18:34 +0200 Piston Design Lowers Fuel-consumption<p><b>​Volvo’s new Heavy-Duty diesel-engines are more fuel efficient due to a new, smart, wave-shaped, piston design. The new design reduces fuel-consumption by two percent and halves the quantity of particulates. The idea of the piston shape came from Volvo AB. In collaboration with Chalmers, the idea could be refined and realized.</b></p>​Ten years ago, diesel-engineer Jan Eismark was struggling with a problem of reducing emissions from Volvo's engines. The permitted limit values for soot particles and nitrogen oxide emissions were constantly lowered. One big challenge is that the particle and soot emission formation in the combustion chamber is just like a rocking board. The methods limiting soot particles increase nitrogen oxides and the methods that lower nitrogen oxides increase soot particles. The challenge was to lower both. <div><br /></div> <div>Jan Eismark conducted a variety of engine experiments with different pistons and fuel injectors and saw that the soot emissions were very different. The conclusion was that the shape of the combustion chamber, which is completely shaped by the piston top, ought to be very important. </div> <div><br /></div> <div>In the case of a standard piston, the injector is located in the centre of the piston bowl (combustion chamber) and the fuel is sprayed towards the sides of the bowl through a number of orifices in the injector. The combination of heat and pressure causes the fuel to ignite before it reaches the combustion-chamber walls. The flame hits the wall at a speed of up to 50 meters per second, it then spreads along the piston bowl wall at an angle of 180 degrees where-after it collides with the adjacent flames. When the flames collide, they compete for the available oxygen. At the same time, the oxygen in the centre of the combustion chamber is never fully used. </div> <div><br /></div> <div>&quot;We wanted to find a way to lead the flames more inwardly into the combustion chamber to better utilise the available oxygen there&quot;, says Jan Eismark. </div> <div><br /></div> <div>Jan Eismark became an industrial PhD student at Chalmers, to develop the idea together with Chalmers’ researchers through studying fundamental mixing and spray phenomena and combustion mechanisms. </div> <div><br /></div> <div>&quot;The research work in the project has been very extensive and includes, in addition to Volvo's engine experiments, advanced computerised combustion calculation and high-speed recording of the combustion inside the cylinder&quot;, says Ingemar Denbratt, director of the <a href="/en/centres/cerc">Combustion Engine Research Centre</a>, where the research at Chalmers was conducted. </div> <div><br /></div> <div>The research was used to improve the combustion system and resulted in the unique wave design in the piston bowl. The injector position in the centre of the piston bowl has six holes allowing the fuel to be injected in between the waves helping the flames to be directed towards the centre of the piston bowl. The available oxygen could therefore be consumed more efficiently. </div> <div><span style="background-color:initial"><img src="/SiteCollectionImages/Institutioner/M2/Artiklar/lastbilartikel.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:300px;height:200px" /><br /></span><span style="background-color:initial">After that, industrialisation has been taken over by AB Volvo and in 2017 the new piston “arrived” in the first</span><span style="background-color:initial"><br /></span></div> <div>trucks in the United States. Fuel consumption has been reduced by two percent and particulate emissions have been halved. According to AB Volvo, the concept give big fuel savings on Volvo's products and reduction in carbon-dioxide emissions of 5 megaton per year. </div> <div><br /></div> <div><em>(For comparison, a return flight between Sweden and Thailand corresponds to approximately 2.5 tonnes of carbon-dioxide emissions per person, hence 5 megaton of carbon-dioxide emissions corresponds to approximately two million Thailand voyages.)</em></div>Tue, 05 Jun 2018 07:50:00 +0200 thesis gives the aircraft industry new methods to reduce emissions<p><b>​By utilising the design framework developed as part of Marcus Lejon’s PhD thesis, highly efficiency compressors can be designed which would contribute to reduce emissions of greenhouse gases from aviation.</b></p>​Aircraft engine manufacturers strive to improve current state of the art designs through continuous development efforts. By improving existing designs and exploring new alternatives, the goal is to reduce the fuel consumption. <div><br /></div> <div>To achieve a low fuel consumption, turbofan engines should operate at a high overall pressure ratio which is commonly achieved by an axial compressor. An axial compressor consists of a set of consecutive stages, each consisting of a rotating and stationary blade row. While a compressor should operate with a high-pressure ratio, it should not operate too close to its stability limit where surge can occur. Care must be taken when designing a compressor so that it can operate safely and with high efficiency. If the pressure increase across the compressor is high, it may be operating close to its stability limit. Beyond this point, surge can occur, a dangerous phenomenon where the performance drops and the flow through the compressor may even reverse direction. </div> <div><br /></div> <div>”My work has focused on a framework for designing the low-pressure system of an aircraft engine. To determine an appropriate degree of complexity to include in the computational model, and to determine an appropriate measure to quantify stability of a compressor.” says Marcus Lejon. </div> <div><br /></div> <div>Furthermore, aspects which may be detrimental to performance have been investigated, namely the impact of geometric variations which occur from the manufacturing process of a compressor blade and surface degradation from in-service use. </div> <div><br /></div> <div>As a part of his work, he has determined an appropriate measure for stability and applied it in the design of a three-stage compressor with high efficiency and stability. </div> <div><br /></div> <div>“This exercise showed the versatility of the method by designing different stages, and demonstrated that the proposed stability measure worked well in the design phase” says Marcus Lejon </div> <div><br /></div> <div>By utilising the design framework developed, highly efficiency compressors can be designed which would contribute to reduce emissions of greenhouse gases from aviation. The design framework and the method used to analyse manufacturing variations will be used at GKN Aerospace, the collaborative partner in his project. </div> <div><br /></div> <div>Marcus Lejon will present and defend his PhD thesis Aerodynamic design framework for low-pressure compression systems June 8 at 10.00 in lecture hall HA2.</div>Mon, 04 Jun 2018 11:00:00 +0200 build self-driving race car<p><b>​As the first and only Swedish team, Chalmers has qualified for the prestigious Formula Student Driverless competition in Germany. With a unique software in their car, the team hopes to wipe the floor with their competitors.</b></p><div>Already available was a whole lab dedicated to the development of self-driving vehicles, a proprietary software platform, and a ready-made electric racing car from last year's Formula Student competition.</div> <div><br />&quot;From there, it was quite a small step, to start a student team to rebuild the car for self-driving and compete in the race class for driverless cars,&quot; says the initiator and supervisor Ola Benderius, assistant professor at the Vehicle Engineering and Autonomous Systems Division.<br /><br /></div> <div>Since last autumn, twelve students from five different master programs have worked to make the car self-driving as part of their master’s thesis.</div> <div><br />&quot;It's extremely fun and educational. It's a brand-new project and we have had a lot of freedom to achieve our goals,&quot; says team manager Emil Rylén, who studies Automotive Engineering.</div> <div> </div> <h3 class="chalmersElement-H3">A dedicated and multifaceted team</h3> <div>The team is divided into three groups, who work with each of the three main elements of self-driving: to perceive and interpret the surroundings, driving planning and control, and mechanical and electronic hardware to execute the control signals. Two of the team members were also in the team that built the car last year.</div> <div><br />&quot;We couldn’t have done it without them. They know and understand how the car works,&quot; says Rylén.</div> <div>He describes the team as a very mixed group, both in terms of nationality, education and skills.</div> <div><br />&quot;Everyone is really dedicated. You definitely do not have to be a racing fan, but rather a technology fan and someone interested in cutting-edge technology.&quot;</div> <div> </div> <h3 class="chalmersElement-H3">Equipment for half a million SEK</h3> <div>To make the car self-driving, they have equipped the car with sensors like GPS, laser radar, dual-lens camera for deep vision, computers, and extra electronics and mechanisms to actuate the brakes, wheel, and accelerator. In total, the equipment cost about half a million SEK, but much of it will be reusable in coming years.</div> <div><br />Financing is already ready for another three years. Interest among the students is very high, as is the industry's interest in recruiting those who participated in the team. Ola Benderius and his two supervisor colleagues – Christian Berger and Björnborg Nguyen – are already gathering next year's team.</div> <div><br />It is also advantageous for the Chalmers lab for self-driving vehicles, <a href="/en/researchinfrastructure/revere/Pages/default.aspx" target="_blank">Revere</a>, to have a team in Formula Student Driverless.</div> <div><br />&quot;We get a chance to showcase Reveres’ abilities and skills, and the team attracts really good students. Hopefully, some of them hope to stay on as PhD students. In addition, the team is developing stuff that we can use in research,&quot; says Benderius.</div> <h3 class="chalmersElement-H3">Tests and competition in sight</h3> <div>In addition to the team being able to use Reveres’ premises, vehicles and skills, they also get time on the test track Astazero. At the moment, they can drive the racing car using a handheld remote control, but there is still a few weeks work before they can go over to self-driving tests.</div> <div><br />&quot;It will be very fun to test and go to the competition. Then we can reap the benefits of all the work we put down during the year,&quot; says Rylén.</div> <div><br />While the other teams qualifying for the competition all chose the same well-established but somewhat obsolete software, the Chalmers team uses Chalmers’ proprietary software platform for driverless vehicles, OpenDLV.</div> <div><br />“It makes us unique. A stable software is really important to succeed in the competition, and with experience from research, we know how to design it,&quot; says Benderius.</div> <h3 class="chalmersElement-H3">About the Formula Student Driverless competition</h3> <div>The competition will take place 6–12 August in Hockenheim, Germany, and includes a number of different challenges: braking, acceleration, skidpad testing and a track drive. The team will also have to present and explain their software and hardware design, as well as a business model. Read more about the competition at <a href="" target="_blank">Formula Student Germany</a>.</div> <div><strong><br />Read more:</strong></div> <div>Chalmers also has student teams that build and compete with driver-controlled electric race cars and sailboats. Read more on the <a href="" target="_blank">Chalmers Formula Student website</a> and in the article <a href="/en/news/Pages/Organic-boat-building.aspx">Organic boat building in a nutshell</a>.</div> <div><br />Text: Ingela Roos</div> <div>Photo: Johan Bodell</div> Fri, 25 May 2018 17:00:00 +0200 cars may avoid whiplash injuries<p><b>​Every day between 30 and 300 people get whiplash injuries. A common cause is when the vehicle has been hit in the rear. Many of these accidents could be avoided by driving an electric car. How this could be done is shown in Adithya Arikere’s PhD thesis.</b></p><div><span style="background-color:initial">“In my project, we tried to find novel active safety applications for electrified drivetrains that cannot be achieved or at least performed as well with traditional internal combustion engines” says Adithya Arikere.</span><br /></div> <div><br /></div> <div>Electric drives have a lot of advantages over internal combustion engines. They have fast and reliable response, precise and accurate control, max torque from standstill and more. Some of these can be exploited to achieve novel or improved active safety functionality. </div> <div><br /></div> <div>&quot;A simple example is if you can detect that you are about to be hit from behind and you have the free space in front to accelerate and get out the way, you can do so with an electrified drivetrain&quot; says Adithya Arikere. </div> <div><br /></div> <div>This cannot be done reliably with an internal combustion engine since they have poor low-end torque, large response times and the transmission can be in the wrong gear. But with electric drives which deliver their peak torque at low speeds, have short response times and typically don’t need a transmission, this can be easily and reliably achieved. Adithya Arikere has investigated three scenarios in detail: the rear-end collision, obstacle avoidance with oncoming traffic and intersection accidents. </div> <div><br /></div> <div>&quot;We have found that in each case, the quick and reliable response of electric drives can be used to perform interventions that can avoid or mitigate accidents and yield a significant safety benefit&quot; says Adithya Arikere</div> <div><br /></div> <div>Since his project deals with finding novel active safety applications for electrified drivetrains he believes it can make electrified vehicles of the future safer and consequently, also make them more attractive to consumers since these safety functions cannot be achieved with traditional internal combustion engine based vehicles. This in turn could help drive electrified vehicle sales and therefore help mitigate climate change and local emissions.</div> <div><br /></div> <div>Adithya Arikere presents his PhD thesis<a href=""> Vehicle Dynamics Control for Active Safety Functions using Electrified Drivelines​</a> at April 10, 10 AM in KB lecture hall. </div> <div> </div> <div><br /></div> <div><br /></div> <div> </div> <div><br /></div> <div><br /></div> Wed, 04 Apr 2018 08:00:00 +0200 mariners as test participants wanted<p><b>​​First time ever: STM tools and functions to be evaluated in the European Maritime Simulator Network (EMSN) in March 13-16 2018! Chalmers and SMA are looking for test participants.​​</b></p><p class="MsoNormal" style="text-align:justify"><span lang="EN-US">The Sea Traffic Management Validation Project has developed and created a network of interconnected simulator centers in several EU countries – the European Maritime Simulator Network (EMSN) consisting of both ship handling bridges and VTS/Shore Centers. This network enables testing of Sea Traffic Management in complex traffic situations, port approaches, confined waters as well as other functions, like Search and Rescue, as a safer alternative to live testing. Several new services such as improved ship to ship route exchange, Port Call synchronization, enhanced monitoring and navigational assistance, etc. have been or will be implemented in the simulation testbed and need to be validated and tested by professional mariners.</span></p> <h2><span lang="EN-US">Scenarios</span></h2> <p class="MsoNormal" style="text-align:justify"><span lang="EN-US">Up to 30 ships with manned bridges are expected to participate in scenarios in the southern Baltic and English Channel with a limited amount of target vessels reflecting normal conditions for the area in question. The bridge teams are to navigate their ships according a pre-planned route and schedule.</span></p> <h2><span lang="EN-US">Qualifications for test persons</span></h2> <p class="MsoNormal" style="text-align:justify"><span lang="EN-US">The simulator bridges are to be manned by two deck officers forming a navigator/co-navigator team. One of the officers is required to have experience in a senior position on board and preferably have a Master Mariner CoC. The other officer may be a junior officer with a 3<sup>rd</sup> Mate’s license or a senior student of the Master Mariner program. Language prerequisite is English as several nationalities are forming part of the EMSN.</span></p> <h2><span lang="EN-US">Register for the simulations in March here:</span></h2> <p class="chalmersElement-P"> <span style="font-size:11pt;line-height:115%;font-family:calibri, sans-serif"><a href=""><span lang="EN-US" style="font-size:14pt;line-height:115%"></span></a></span><br /></p> <p class="chalmersElement-P"><span lang="EN-US"></span></p> <div> </div>Fri, 23 Feb 2018 10:00:00 +0100 vehicles for a safer mining industry<p><b>​Self-driving trucks in mines and in mining areas reduces the risk of injuries, while at the same time making the work more efficient. Two self-driving mining vehicles are now to be developed in a recently launched project with Chalmers as one of the partners.</b></p><div>​“Self-driving vehicles are important in the mining industry for several reasons,” says Mattias Wahde, professor in vehicle engineering and autonomous systems at Chalmers. “One important reason is that you want to minimize the risk of personal injuries by having as few people as possible in the mine. With self-driving vehicles, staff can control and monitor machinery and equipment from a control room.”</div> <div> </div> <div>Self-driving vehicles can also increase the efficiency, for example through minimized waiting times for the various vehicles in the mine. To this end, Mattias Wahde and his research group will develop algorithms for route planning and coordination, both in the mine and for transport from the mine.</div> <div> </div> <h4 class="chalmersElement-H4">A safe and fully automated transport system</h4> <div>The purpose of the project is to build a safe and efficient fully automated transport system, able to navigate in narrow spaces such as mines, but also on public roads. The material from the mine can thus be transported without a driver in the vehicle, all the way from the mining area to the enrichment plant. The system should be able to work both with and without support from various infrastructure systems such as GPS, WiFi and 4G.</div> <div> </div> <h4 class="chalmersElement-H4">Two self-driving vehicles with high traffic safety</h4> <div>Two different transport systems of self-driving trucks will be developed in the project. Both will provide high traffic safety as well as optimized use of the vehicles for mining. The existing infrastructure of the mining area will to a certain extent be adapted to the vehicles.</div> <div> </div> <div>One of the two vehicles will transport ore from the mine to the surface. The ore will then be transported from the transshipment site at the mine to the enrichment facility by the second vehicle, a self-driving truck with trailer. The transports will be monitored via a traffic management system.</div> <div> </div> <div> </div> <div><strong>FACTS: Auto pilot site to plant</strong></div> <div>The project Auto pilot site to plant is running until March 2019. It is funded by Vinnova and led by AB Volvo. Chalmers, AB Volvo, Combitech and Boliden participate in the project.</div> <div><em>Contact</em>: Mattias Wahde, +46 31 772 37 27, <a href=""></a></div> <div><em> </em></div> <em> </em><div><em>Text: Malin Persson, Emilia Lundgren</em></div> <em> </em><div><em>Photo: Emilia Lundgren</em></div>Mon, 19 Feb 2018 00:00:00 +0100 boat building in a nutshell<p><b>​A dinghy with a core made of balsa wood, flax and a cashew nut based epoxy. That’s what eight students at Chalmers are working with this winter. Formula Sailing is a boat building project where 70 percent of the boat core has to be made of biomaterials. In September they will compete in Italy – and during ‘Båtmässan’ they will display the dinghy.</b></p><p>​Since August last year, the students have been designing and building the unusual race dinghy. All the boat builders are all students at the master’s programme Naval Architecture, after studying mechanical engineering their first three years at Chalmers.In an on-campus workshop, the students are laminating the balsa wood boat core with flax and cashew nut based epoxy. Erik Ericsson, one of the students in the project, has been in charge of choosing materials.<br />– We have chosen a core that is a softer and weaker material, balsa wood. And on each side of that core you have a laminate with several layers of flax/bioepoxy. That provides structure with stiffness and strength, says Eriksson. <br />– Epoxy is basically a form a glue that glues together the flax fibers with the core, says Simon Granli who’s also a part of the project group. <br />Eric Eriksson admits the chosen lamination won’t be as good as carbon fiber or glass fiber would be – but those are materials the rules of the competition won’t allow them to use. Based on the flax/cashew nut epoxy’s stiffness to its weight ratio, it’s one of the best possible choices from the organic world. <br />– The weight is important! The less the dinghy weighs, the faster is goes, says Granli. </p> <p><br /></p> <p><strong>Competing in Italy this fall</strong><br />Each year, boats representing universities all over the world compete in a three-day race. Last year, the competition was held in Palermo in September. The two main supervisors at Chalmers then attended the races to see and learn. Most likely the venue will be the same in 2018 and the time will again be late September. <br />During the summer, the Chalmers students will practice sailing the dinghy, and prepare for the competition. The rules state that the sailor of the boat must be a student from the same university as the design and building team, and the recruitment of this person who will be sailing is under way at the time of writing.<br /><br /><strong>Exhibition at Båtmässan</strong></p> <p>From the 3rd to 11th of February, Chalmers Formula Sailing will be exhibiting the sail dinghy at the boat fair, Båtmässan, at Svenska Mässan in Gothenburg, in booth number F04:21 (GKSS).</p> <p><br />See the <a href="">video</a></p> <p>Read more about the <a href="/en/centres/sportstechnology/research/sailing/Pages/Formula-Sailing.aspx">Chalmers Formula Sailing project</a></p> <p><span id="ms-rterangepaste-end" style="display:inline-block"><br /></span></p> <strong>FACTS ABOUT THE COMPETITION:</strong><br />Conceive, Design, Implement and Operate are the keywords of the innovative so called CDIO initiative, where the student competition Formula Sailing is included. The goal of the CDIO initiative is to give students a technical fouknowledge base of real-life systems and products, complementing a technical education. Another example of a CDIO project where Chalmers is participating is Formula Student, where students design and build electrical vehicles to race other universities with.<br /><br />Formula Sailing is a part of the <a href="/en/centres/sportstechnology/Pages/default.aspx">Chalmers sports technology initiative</a>. <br /><br /><strong>Text:</strong> Sofia Larsson-Stern<br /><strong>Photo/video:</strong> Johan Bodell<br />Wed, 31 Jan 2018 00:00:00 +0100 Micromasters programme on electrified and autonomous vehicles<p><b>​Chalmers University of Technology launches Micromasters programme: A digital master’s-level credential to advance careers in the most in-demand fields of automotive engineering.</b></p><p>​Together with EdX, the nonprofit online learning destination founded by Harvard and MIT, Chalmers University of Technology today announced the launching of a flexible, affordable credential for career advancement and an accelerated Master’s degree. Scandinavia’s first MicroMasters® programme will be <em>Emerging Automotive Technologies</em>. <br /></p> <p>The programme is a result from Chalmers long term close collaboration with industry. Micromasters programmes offer a modular credential with a pathway to credit and are designed for learners looking for in-demand knowledge to advance their careers or follow a path to an accelerated on-campus programme.</p> <p>Chalmers is offering a Micromasters programme in Emerging Automotive Technologies, which provides learners with a holistic perspective on emerging technologies fostering sustainability and digitalization within the automotive industry through seven courses and a final capstone exam. This is an advanced, professional, graduate-level foundation in automotive engineering. It represents the equivalent of ca 20 credits of coursework at the Chalmers Masters programmes <em>Automotive Engineering or Systems, Control and Mechatronics.<br /></em></p> Chalmers University of Technology's Micromasters programme in Emerging Automotive Technologies is developed in cooperation with Volvo Cars, Volvo Group and Zenuity and designed to prepare learners for the careers in-demand today. <p>“Volvo Cars is facing a comprehensive competence transformation challenge to stay competitive in the automotive market. Electrification, connectivity and automation is driving a paradigm shift. We believe the ChalmersX Emerging Automotive Technologies Micromasters programme is a valuable complementary tool for both internal training as well as the external recruitment base capabilities” says Mats Moberg, Vice President Complete Vehicle Engineering, Volvo Cars R&amp;D.</p> <p>.</p> <p>Since </p> <p>September 2016, EdX and 25 international partners have launched 46 Micromasters programmes, offering courses in popular subjects, such as cybersecurity, business analytics, data science, artificial intelligence and user experience design. Chalmers University of Technology joins EdX and top global university partners in expanding the initiative, offering learners everywhere access to high-quality, career-focused education.</p> <p>“We are honored to work with Chalmers University of Technology to launch a Micromasters programme in Emerging Automotive Technologies. This offering marks an exciting step toward furthering our shared mission to expand access to high-quality education,” says Anant Agarwal, CEO at EdX and professor at MIT. “The Micromasters programmes on EdX empower learners everywhere to improve their lives and advance their careers. Signaling the next level of innovation in learning, Micromasters programmes are designed to meet the needs of both universities and employers, by providing learners with the in-demand knowledge and skills needed for success in today’s rapidly-evolving and tech-driven world</p> <p>.”</p> <p>Emerging Automotive Technologies begins on March 1st 2018 and is open for enrollment today.</p> <p><br />Watch a <a href="">video </a>about the Emerging Automotive Technologies programme</p> <p><br /></p> <p><a href=""><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more and r</a><span>egister</span> (External website)</p> <p><br /></p> <p><a href="/en/education/moocs/MicroMasters/Pages/default.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about Micromaster programmes at Chalmers University of Technology</a><br /></p>Fri, 12 Jan 2018 10:00:00 +0100 aerodynamic features of future trucks<p><b>There is no doubt that road vehicle transportation is needed to improve efficiency, to reduce power consumption and to contribute to a sustainable mobility. Aerodynamics plays a crucial role in this, and its optimization can have a significant impact on fuel efficiency. The role of aerodynamic research for transportation is to investigate solutions to improve the aerodynamic performance that minimizes power consumption. The main objective of Guglielmo Minelli&#39;s thesis is, therefore, to reduce drag, controlling the external flow that normally surrounds a road vehicle, by means of &quot;active flow control&quot;.</b></p>​<span style="background-color:initial">Active flow control was shown to be an effective and low energy consumption technique to improve the external aerodynamics of a traveling truck. </span><div><br /></div> <div>“Controlling the flow around a vehicle, one not only minimizes the aerodynamic drag but also improves the comfort of the driver, reducing noise and soiling,” says Guglielmo Minelli.</div> <div><br /></div> <div>He tells that the ambition of Europe is clear: by mid-century, greenhouse gas emissions from transport will need to be at least 60% lower than in 1990 and be firmly on the path towards zero. Emissions of air pollutants from transport that harm our health need to be drastically reduced without delay. </div> <div><br /></div> <div>“Trucks, in particular, need to improve their efficiency to extend their mileage and decrease their power consumption. Thus, improving the aerodynamic features of heavy trucks and road vehicles is a necessary contribution toward the target, and active flow control can play an important role in this” says Guglielmo Minelli.</div> <div><br /></div> <div>The results of his work focus on two main points. First, synthetic jets were shown to be an effective and low energy consumption technique to control a pressure induced separated flow. Both computational fluid dynamics results and wind tunnel experiments demonstrated the efficacy of active flow control by significantly improve the aerodynamic performance of a road vehicle. Second, the computational fluid dynamics hybrid numerical method PANS was shown to be an interesting approach for industrial applications. </div> <div><br /></div> <div>“Its capability to resolve unsteady flow cases preserving the accuracy of the flow structures is shown, even when meshes are relatively coarse.” Says Guglielmo Minelli</div> <div><br /></div> <div>Guglielmo Minelli will defend his thesis “Flow Control for Aerodynamic Drag Reduction of Trucks” <a href="/sv/institutioner/m2/kalendarium/Sidor/Flow-Control-for-Aerodynamic-Drag-Reduction-of-Trucks.aspx">December 8 at 10.00 in lecture hall KB. </a></div> Tue, 05 Dec 2017 14:00:00 +0100 thesis could make a more fuel efficient aircraft possible<p><b>Lowering of fuel consumption and emissions is of paramount importance in the aerospace industry but the aircraft engine is a complex system. The different parts are dependent on each other and it’s difficult to determine which component to take care of first and foremost to make the aircraft engine more efficient. Oskar Thulin deals with this in his PhD thesis ”On the analysis of energy efficient aircraft engines”</b></p><div><div>The aircraft engine consists of many integral components and each component will influence the overall performance of the system. Furthermore, the aircraft engine has weight and contributes to drag that must be compensated for by the engine. Using the regular way to assess performance, it is impossible to compare one component's loss to another or to directly relate an individual component's loss to the overall loss. Oskar Thulin has developed an analytical method that makes it possible to directly compare component losses in a system perspective. The method also makes it possible to include weight or caused drag in the analysis.</div> <div><br /></div> <div>&quot;This gives a much more clear picture of how big the losses are for the various components, as well as for each component type&quot; says Oskar Thulin.</div> <div><br /></div> <div>The developed framework is used to study various aircraft engines. In general, it can be said that the hot exhaust gases that leave the engine, the combustion process in itself, and the part of the kinetic energy in the exhaust that is not used to propel the aircraft forward, are the main sources of the overall loss.</div> <div><br /></div> <div>&quot;Based on the analysis you can discuss different technologies that can do something about these dominant losses. This enables a future more fuel-efficient airplane, says Oskar Thulin, who will present his PhD thesis at Chalmers University of Technology<a href="/en/departments/m2/calendar/Pages/On-the-analysis-of-energy-efficient-aircraft-engines.aspx"> on December 6 at 10:00 in HB4. </a></div></div> <div>​<br /></div> Fri, 01 Dec 2017 15:00:00 +0100 study: Chalmers a top maritime university<p><b>The maritime education and research provided at Chalmers University of Technology is of the highest international standard, according to the first global study undertaken in the field.  ​</b></p>​<span style="background-color:initial">This comes as no surprise to those in the division of Maritime Studies on Campus Lindholmen at Chalmers University of Technology. </span><div><br /><span style="background-color:initial"></span><div>“We’ve always hoped and believed that we would be placed high on the list and this is our confirmation. In Sweden we have long had high-quality maritime education and training, and our sailors have a reputation for competence. Over the past ten years we have also worked hard to further develop and improve the quality of the educational programmes,” says Fredrik Olindersson, Head of the Division for Maritime Studies at Chalmers.</div> <div><br /></div> <div><a href="">The International Association of Maritime Universities (IAMU) </a>, an organisation whose members include more than sixty of the most prominent universities in the field, is behind the study. Chalmers was elected to IAMU in 2016.</div> <div><br /></div> <div>“It took over a year to become a member. You have to send in masses of documents, and they carry out site visits to make sure you live up to their high standards. Not just anyone can join. At the last Annual Meeting a couple of new universities joined, but several also applied and were not accepted,” Olindersson says. </div> <div><br /></div> <div>The study is intended to give IAMU’s member universities an idea of where their strengths lie and what they could develop. So the organisation does not provide traditional rankings but confines itself to listing, in alphabetical order, the universities that fall in the upper quartile (top 25%) in the three areas studied. </div> <div>“Chalmers University of Technology came out top in all the areas studied – global exchange, strength of research and quality of education. What is most striking about the study is that Chalmers is the most well-balanced university. That is Chalmers’ strength and one that should be nurtured and further developed,” says Takeshi Nakazawa, Executive Director of IAMU.</div> <div><br /></div> <div>Olindersson explains that Chalmers is often used as a model for a maritime educational institution around the world and that is why there are so many international visits to Chalmers. </div> <div><br /></div> <div>So what is the strength of maritime education and training in Gothenburg?</div> <div><br /></div> <div>“In addition to having competent teachers, we are one of the few educational institutions which invests a great deal in simulator education and in the work of simulator instructors. We want to maximise the impact of the expensive time spent in the simulator that forms part of the training.”</div> <div><br /></div> <div>According to Olindersson, Chalmers University of Technology is far ahead of most others in the world in its educational work on sustainability and the environment. All maritime training in the world complies with the International Convention on Standards of Training, Certification, and Watchkeeping for Seafarers (STCW) which governs the minimum standards of training, but like other IAMU members, Chalmers offers education and training at a significantly higher level.</div> <div><br /></div> <div>“The Heads of Programmes have continuously extended the programmes and have placed much greater emphasis on leadership, communication, critical thinking, and sustainability. To improve the eligibility of students, and their employability in the long term, we have also introduced a number of elective courses to the programmes. On the Master Mariner programme, students can choose to specialize in passenger and cruise ships, tanker shipping or the offshore sector. The Marine Engineer programme now includes a high voltage element, and there are elective courses in advanced ship operations, marine risks, and marine ergonomics.”</div> <div><br /></div> <div>On the research side, maritime environmental sciences, maritime human factors and marine technology are strong Chalmers areas. Read more about Maritime Studies here.</div> <div><br /></div> <div>“Global exchange mainly involves student and teacher exchanges, where we’ve increased the options in recent years by teaching the final year in English. What sets us apart is that many other universities don’t do this. However, we’ve got several exchange agreements that are working well and another couple is under way that will hopefully lead to more exchanges,” Olindersson says.</div> <div><br /></div> <div><strong>Swedish simulator centre for shipping</strong></div> <div>Campus Lindholmen houses <a href="/en/departments/m2/simulator-labs/simulators/Pages/default.aspx">Sweden’s most extensive simulator centre for education and research in shipping</a>. There are a total of nine different simulators here. In the full mission bridge simulators, it is possible to carry out complete simulations of the operations performed on a real ship: in different weather conditions, with different types of ships around you and in different areas and ports around the globe, even in narrow straits. Other simulators combine instruments that handle navigation, loading, safety, the engine room and emission control. Together with the Swedish Maritime Administration’s simulators the centre currently offers ten ships’ bridges, two coastal stations, and one maritime rescue coordination centre.</div> <div><br /></div> <a href="/en/departments/m2/research/maritimestudies/Pages/default.aspx"><div>Read more about Maritime Studies at Chalmers here.</div></a><div><strong>Contacts and further information</strong></div> <div>Fredrik Olindersson, Head of the Division for Maritime Studies at Chalmers University of Technology, +46-31-772 2648, <a href=""> </a><br /><br /></div> <div>Johan Eliasson, Head of the Marine Engineer programme, Chalmers University of Technology, +46-31-772 2665,<a href=""> </a></div> <div><br /></div> </div>Fri, 01 Dec 2017 08:00:00 +0100 wants to stop dangerous vibrations<p><b>Industrial PhD student Hans Lindell from Swerea IVF has worked to reduce and investigate how vibrations affect humans for almost 30 years. Recently, he was elected chairman of an international standardization committee working with vibrations. In the committee, he wants to try to influence the standard so that dangerous vibrations can be stopped.</b></p>​<span style="background-color:initial">Vibration damage is the most common occupational disease in Sweden. Every day, 400,000 people work for more than two hours a day with vibrating machines. This causes a large number of chronic damage to the nerves, vessels, muscles and skeletal system. But it doesn’t have to be like this.</span><div><br /></div> <div> - Machines don't need to vibrate and hurt people! There is no physical law that confirms that” says Hans Lindell, who has shown that machines with significantly lower vibrations can be developed.</div> <div><br /></div> <div>With help from research results, it has been possible to rebuild existing machines, such as chisel hammers and nutrunners, to show that it is possible to greatly reduce vibration levels. Two types of vibrations that are attempted to counteract are rotating and translating that goes back and forth. One of the techniques used is called ATVA (Auto Tuning Vibration Absorber) and is based on vibration reductions by counteracting the forces that cause the vibrations. Prototypes are currently being tested in the field with satisfactory results. Recently, the project was also awarded additional funds from Vinnova to scale up the project and introduce prototypes in vibration-free, industrial demonstration environments in full production.</div> <div><br /></div> <div>Hans Lindell thinks that his extensive experience in the field was the reason for him being elected as chairman of the International Standardization Committee named ISO/TC108/SC4/WG3. One of the standards under the group's responsibility is ISO 5349, which states how to measure and assess the risks of vibrations on handheld tools. Hans Lindell thinks that it feels both nervous and at the same time very fun to get the presidency.</div> <div><br /></div> <div>- There is a great need for an adjustment of the current standard so that it also takes into account machines with impacts and shocks that give high frequency vibration which we suspect cause a large part of the damage. As a chairman, you will be able to drive a change&quot; says Hans Lindell.</div> <div><br /></div> <div>A lot of things are already about to happen thanks to Hans Lindell's research. Machines, where the high-frequency vibration is remedied, will be released on the market within one year. As far as ATVA technology is concerned, it probably takes a few years, but future users will get fewer injuries, machine manufacturers get an opportunity to increase their competitiveness and society earns on reduced costs for a disease. However, there is much more to be found in the vibration area. The ATVA technology is applicable to considerably more uses than handheld machines. There is a lot of applications where vibrations need to be reduced.</div> <div><br /></div> <div> - What's so funny is that the deeper you get into a problem, the more unanswered questions are found&quot; says Hans Lindell</div> <div><br /></div> Thu, 23 Nov 2017 14:00:00 +0100 autonomous and eco-friendly public transportation into cities<p><b>Sohjoa Baltic is a EU-funded project that aims to facilitate the transition to autonomous and eco-friendly public transport in the cities around the Baltic Sea. The project involves 13 partners across 8 countries. Chalmers will, among other things, contribute with knowledge of vehicle engineering, autonomous technical development, intelligent cooperative driving behavior and risk analysis.</b></p>​<span style="background-color:initial">The project works towards increasing the attractiveness of public transport service and introducing automated driverless electric minibusses, especially for the first and last mile of the journey. It proposes recommendations for eco-friendly and smart automated public transport and guidelines on the organizational set-up. The goal is to achieve profound changes where city residents choose public transport in front of their own car.</span><div><br /></div> <div>Chalmers contributes with its expertise in safety and operational requirements and will conduct research related to service quality, development of new technology for autonomous vehicles, driving behavior, weather impacts, disability adjustment and risk analysis. Responsible for Chalmers part of the project is <a href="/en/Staff/Pages/mauro-bellone.aspx">Mauro Bellone</a>, researcher working with the Adaptive Systems group at the Department of Mechanics and Maritime Sciences.</div> <div><br /></div> <div>Sohjoa Baltic is led by Metropolia University of Applied Sciences in Finland. The project is financed by the EU and has received about 4 million euros.</div> <div>​<br /></div> <div></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/M2/csm_IBSR_logo_EUflag_1000px_001a756769.jpg" alt="" style="margin:5px;width:645px;height:177px" /><br /><br /><br /><br /><br /></div> Tue, 07 Nov 2017 10:00:00 +0100 Brynolf: Coordinator for Sustainable Vehicle Technologies<p><b>​She does research on tomorrow’s fuels and believes that we need to change our view on transportation. Selma Brynolf is coordinator for the profile Sustainable Vehicle Technologies within Chalmers Areas of Advance Transport and Energy.</b></p>​“It's an exciting assignment and I look forward to learning more about the research on transport and sustainable vehicles that is conducted at Chalmers and University of Gothenburg.”<br /><br />As post-doc at the department of Space, Earth and Environment at Chalmers, Selma Brynolf has evaluated the environmental impact of marine fuels from a lifecycle perspective and worked with modeling of energy systems. Since October 2017, she will also coordinate Sustainable Vehicle Technologies, a profile shared between the Areas of Advance Transport and Energy. She will work together with Anders Nordelöf, who continues his assignment as vice coordinator.<br /><br />“I currently work with two main questions”, says Selma Brynolf. “Evaluation of possible future fuels and propulsion technologies for shipping, as well as the role that fuels produced from carbon dioxide and water using electricity could have in the transport sector.<br /><br />Maria Grahn, previous coordinator of Sustainable Vehicle Technologies, is now director of Chalmers Energy Area of Advance.<br /><br />“I am pleased and proud to announce a new, strong leadership for Sustainable Vehicle Technologies. Handing over to Selma Brynolf and Anders Nordelöf feels very good, I am certain that the work will be continued in the best possible way.”<br /><br />Selma points out that an important and challenging part of her research is to find sustainable solutions for all modes of transport. She believes that electrification is a possibility for many parts of the transport sector, not just for cars, and that it is very exciting to follow the development.<br /><br />“But there are many more areas that need to be developed. I also believe that we need to think again and change our view of transport in general and the benefit they give us. I hope to contribute to a slightly more sustainable transport sector.”<br /><br />Text: Julia Jansson och Emilia Lundgren<br />Fri, 03 Nov 2017 10:05:00 +0100 through digitalisation of the maritime industry<p><b>​ECOPRODIGI is a newly launched EU-funded research project addressing eco-efficiency through digitalisation of the maritime sector in the Baltic Sea region. The project includes 27 partners across 8 countries. Chalmers contribution is digital technology applications.</b></p>​<span style="background-color:initial">ECOPRODIGI is an ambitious 3-year project with 27 partners across 8 countries. Chalmers has received EU-funding to take part in this project, addressing eco-efficiency through digitalisation of the maritime sector in the Baltic Sea region. ECOPRODIGI project kick-starts a unique collaboration between research organisations and the industry end-users to create and pilot digital solutions increasing eco-efficiency throughout the vessel life cycle. Ultimately, the project supports the Baltic Sea region in becoming a front-runner in maritime industry digitalisation and clean shipping.</span><div><br /></div> <div>ECOPRODIGI focuses on creating and piloting digital solutions for vessel performance monitoring, cargo stowage optimization as well as shipyard process optimization. In addition to the digital solutions, the project will produce a roadmap for maritime sector digitalisation and policy recommendations. The project will also design and deliver training programmes for shipyard ecosystems and organize public events to deepen the networks within the maritime sector.</div> <div><br /></div> <div>Chalmers University of Technology is responsible for investigating and piloting digital technology applications, such as 3D-scanning, to enhance the eco-efficiency of shipyard processes (ship building, repair, maintenance, and retrofit).</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/IMS/Produktionssystem/Ecoprodigi-kickoff-710x250.png" alt="" style="margin:5px" /><br /><em>Participants of the ECOPRODIGI project kickoff in Turku, Finland.</em><br /><br /></div> <div><span style="background-color:initial">ECOPRODIGI is led by the </span><a href="">University of Turku</a><span style="background-color:initial"> (Finland), The project has received more than €3 million from the Interreg Baltic Sea Region Programme. With the partners’ own contributions, the overall project budget is €4.2 million. </span><br /></div> <div><br /></div> <div>The project’s results, news and open events are communicated on our website <a href="" target="_blank">​</a> and on Twitter @ECOPRODIGI_BSR. </div> <div><br /></div> <div>For more information: <a href="/en/projects/Pages/Ecoprodigi-QEco-efficiency-to-maritime-industry-processes-in-the.aspx">Chalmers ECOPRODIGI project page</a></div> <div><br /></div> <div><strong>Contact</strong></div> <div>Björn Johansson</div> <div></div> <div>+46 31 772 38 09 </div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/IMS/Produktionssystem/Ecoprodigi-logga-1_750x210.png" alt="" style="margin:5px" /><br /><br /><br /></div>Thu, 02 Nov 2017 17:00:00 +0100