Applications of Laser-Induced Exciplex Fluorescence to Single Droplet and Fuel Spray Visualization.

摘要

The purpose of the work described in this final report is to develop and exploit (exciplex-based) fluorescence diagnostics in order to investigate the heating and vaporization of hydrocarbon fuel droplets in both isolated and fuel spray environments. In the course of the investigations, experimental and computational techniques have been developed (a) for imaging (and correcting images) of an equatorial 'slice' of sub-millimeter diameter droplets, (b) for exciplex fluorescence thermometry of optically thick droplets ('surface temperatures') and optically thin droplets ('volume averaged temperatures'), (c) for generation and/or study of droplets, particularly at pressures greater than 25 atmospheres, and (d) for two dimensional imaging of radiative lifetimes (equivalence ratio imaging).