The SHRL have been awarded a £1.3m EPSRC research grant to study the deformation of microscopic fuel droplets.
We are seeking to recruit two EPSRC Research Fellows.
We are currently offering a fully funded PhD studentship on laser diagnostics for sprays.
Laser Induced Incandescence (LII)
Contact: Dr Cyril Crua
LII of a diesel spray
Laser-Induced Incandescence (LII) takes place when a high power laser beam hits particulate matter
like soot. As the particles gain energy from the beam, their temperature increases and if the energy absorption rate
is high enough, the soot particles will reach incandescent temperatures (4000 K) and produce near-blackbody emission.
The radiation emitted is nearly proportional to soot volume fractions (Melton, 1984). As instantaneous planar measurements can be easily obtained, LII has emerged as an attractive and versatile technique for the measurement of soot concentrations in unsteady flows of complex geometry. For soot concentration measurements, LII has at least two significant benefits when opposed to other optical techniques, firstly it is more sensitive than sampling techniques, and secondly, its broadband radiation widens the range of collection strategies available to the experimenter.
Laser-induced incandescence study of diesel soot formation in a rapid compression machine at elevated pressuresC. Crua, D.A. Kennaird, M.R. Heikal (2003) Combustion and Flame, 135(4), 475-488.
In-cylinder study of the formation, autoignition and soot production of diesel sprays at elevated pressuresC. Crua, J.C. Evans, D.A. Kennaird, M.R. Heikal (2003) 9th International Conference on Liquid Atomization and Spray Systems (ICLASS), Sorrento, Italy, 13-17 July 2003.