The following diagnostic techniques are routinely used for research within CERC:
- High speed imaging for time resolved structure
- Using front illumination imaging for sprays (high intensity LED’s)
- Via schlieren or shadowgraphy in back-illumination for various flows (injector interior flows, gas-phase jets, Diesel spray liquid length determination, flames etc.)
- Using natural luminescence from flames (e.g. OH or CH chemiluminescence) and/or soot thermal emission (can detect two images at two wavelengths to extract soot temperature via the Planck black body distribution)
- Phase Doppler interferometry (PDI) for single-point measurement of drop size distributions and 2-D velocities in a spray
- Planar imaging
- Elastic scattering (Mie) imaging of droplets and planar laser induced fluorescence (PLIF) imaging of fuel vapor in sprays, using fuel tracers - temperatures are also possible
- - Laser induced exciplex fluorescence (LIEF) imaging for 2-D images of drops/vapor and temperature in sprays
- - PLIF imaging of species (e.g. OH and NO) and temperature during combustion
- - Particle image velocimetry (PIV), producing a 2-D image of 3-D velocity vectors
- - Laser induced incandescence (LII) imaging of soot
- Ballistic imaging of initial spray breakup
The following equipment exists within the Combustion Division at Chalmers:
- A Quantel spectroscopic pulsed Nd:YAG/Dye laser system (a second, new system will soon be purchased with the financial support of the Knut and Alice Wallenberg Foundation)
- A Lambda Physik excimer laser
- A two-pulse Spectra-Physics Nd:YAG laser (2nd harmonic) with LaVision cameras and software for 3-D PIV
- A Spectra-Physics Nd:YAG laser with 2nd, 3rd, and 4th harmonics
- Cameras
- High speed (a second, new high speed camera will soon be purchased with the financial support of the Knut and Alice Wallenberg Foundation)
- Two LaVision intensified CCDs
- Two Andor iXON electron multiplying CCD’s
- Two new fast-shutter cameras will soon be purchased with the financial support of the Knut and Alice Wallenberg Foundation
- Phase Doppler interferometry –TSI system (a second, new PDI will soon be purchased with the financial support of the Knut and Alice Wallenberg Foundation)
- Three Spectra-Physics Ti:sapphire femtosecond regenerative amplifiers seeded by one mode-locked laser, used for multiple image ballistic imaging