Advanced Spray Research

The process of fuel/air mixture preparation via an atomizing spray controls combustion efficiency (hence CO2 reduction) and emissions formation in direct injected engines. Understanding of spray breakup is one of the weakest links in understanding of combustion. Professor Linne´s group has developed techniques to overcome experimental difficulties. We are investigating a sequence of flowfields, starting with the most basic and adding complexity in steps. Each step is taken intentionally to pull theorists further into the complexity of an atomizing spray; to fully evaluate dynamics and to stimulate the evolution of predictive models. We are collaborating with a number of leading theorists from around the world (not funded by this proposal) in order to ensure that we proceed in parallel with the appropriate level of model development. The proposed work will focus on very basic steady liquid sprays as they issue into air at one bar.

Start date 09/12/2014
End date The project is closed: 31/08/2016
​​Summary: This grant supports a PhD student who applies ballistic imaging to sprays and further develops the technique. Ballistic imaging is a technique that allows one to image larger structures buried inside a dense could of small drops (see ““Ballistic Imaging of Liquid Breakup Processes in Dense Sprays”, M. Linne, M. Paciaroni, E. Berrocal and D. Sedarsky, invited review article, Proceedings of the Combustion Institute, Vol. 32, pp. 2147-2161, (2009)). It is like creation of a shadowgram as though the drops did not exist. It uses high energy pulses that are 100 fs long, emitted by a Ti:sapphire amplifier system.

Funded by

  • Swedish Energy Agency (Public, Sweden)

Published: Thu 31 May 2018.