Abstract
Instantaneous data of fuel-air mixing is important to design the supersonic combustor, but they are difficult to measure in the supersonic flow-field. Planar Laser Induced Fluorescence (PLIF) using two PLIF tracers is one of promising methods to measure them in the supersonic flow. We use acetone and toluene as PLIF tracers because they can be excited with single excitation laser and their fluorescence spectrum are separated. The problem of this method are temperature and surrounding-gas dependence of their LIF signal intensities and saturation of toluene LIF by excitation laser. In this work, the effects of surrounding gas and temperature against toluene LIF intensity and toluene LIF saturation are investigated.
