RESEARCH PAPERS: Gas Turbines: Combustion and Fuels

Application of Rainbow Thermometry to the Study of Fuel Droplet Heat-Up and Evaporation Characteristics

[+] Author and Article Information
S. V. Sankar, D. H. Buermann, W. D. Bachalo

Aerometrics, Inc., Sunnyvale, CA 94086

J. Eng. Gas Turbines Power 119(3), 573-584 (Jul 01, 1997) (12 pages) doi:10.1115/1.2817023 History: Received February 01, 1996; Online November 19, 2007


Advanced, nonintrusive, laser-based diagnostics are being developed for simultaneously measuring the size, velocity, temperature, and instantaneous regression rates of vaporizing/burning fuel droplets in polydisperse flow environments. The size and velocity of the droplets are measured using a conventional phase Doppler particle analyzer (PDPA), and the droplet temperatures are simultaneously measured with a rainbow thermometer. This integrated diagnostic has been applied to the study of fuel droplet heat-up characteristics in a swirl-stabilized kerosene spray flame. It has also been shown that a novel extension of rainbow thermometry can be used additionally to extract the instantaneous droplet vaporization rate. The feasibility of measuring the instantaneous regression rate has also been demonstrated using controlled experiments with a vaporizing/burning stream of ethanol droplets.

Copyright © 1997 by The American Society of Mechanical Engineers
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