Calibrated LII measurement providing instantaneous soot-volume-fraction images measured from below through the optical piston bowl of a Diesel engine. Courtesy of H. Bladh et al, Lund University.
Soot is considered a hazardous pollutant emission and is typically a result of incomplete combustion processes, and thus is also related to combustion performance. Laser Induced Incandescence (LII) is a laser-optical measurement technique dedicated to soot diagnostics. LII can provide measurements of soot volume fraction, such as in Diesel engine exhaust, and even instantaneous images of soot distribution during formation inside a running IC engine.
Solution Sheet
Learn more about how our LII system can help you solve your combustion testing challenges.
A short, energetic laser pulse is used as an illumination source for LII. The illuminated soot particles absorb the light and in this way they are heated up by the laser pulse to very high temperatures (~4000 K).
Ideal for flow-field measurements in confined spaces where it is difficult to launch a light sheet and in experiments in which the laser must be separated from the flow rig due to vibration
Per Petersson, Rikard Wellander, Jimmy Olofsson, Henning Carlsson, Christian Carlsson, Bo Beltoft Watz, Nicolas Boetkjaer, Mattias Richter, Marcus Aldén, Laszlo Fuchs, Xue-Song Bai
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