Journal or Book Title
The separation of liquid phase and vapor phase laser-induced fluorescence (LIF) signals using tracer species suffers from uncertainties in tracer–fuel coevaporation, as well as a disparity in liquid and vapor signals. This work demonstrates the use of a simple technique, referred to as lifetime-filtered LIF, to help separate the liquid and vapor signals of fuel sprays in oxygen-free environments without the use of added tracers. This is demonstrated for a common aviation fuel, Jet-A, using prompt detection of the liquid phase and time-delayed detection of the vapor phase. A scaled liquid signal subtraction algorithm is also demonstrated for removing vapor phase signal contamination caused by the largest droplets.
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Douglawi, Alber; McMaster, Anthony; Paciaroni, Megan E.; Michael, James B.; Halls, Benjamin R.; Gord, James R.; and Meyer, Terrence R., "Tracer-free liquid–vapor imaging using lifetime-filtered planar laser-induced fluorescence" (2019). Mechanical Engineering Publications. 441.