OH LASER-INDUCED FLUORESCENCE VELOCIMETRY TECHNIQUE FOR STEADY, HIGH-SPEED, REACTING FLOWS

被引:9
作者
KLAVUHN, KG
GAUBA, G
MCDANIEL, JC
机构
[1] University of Virginia, Charlottesville, VA
[2] Aerospace Research Laboratory, Department of Mechanical, Charlottesville, VA
基金
美国国家航空航天局;
关键词
D O I
10.2514/3.23816
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
A high-resolution OH laser-induced fluorescence velocity measurement technique was developed for use in steady, high-speed, reacting flows. A narrow-linewidth laser source was tuned through an isolated OH absorption line to measure the Doppler-shifted line center frequency relative to an iodine reference line. A counterpropagating-beam approach was used to eliminate the collisional impact shift and minimize systematic errors. Results from pointwise measurements of velocity in a unique reacting underexpanded jet facility are compared to an axisymmetric Navier-Stokes calculation with finite-rate chemical kinetics as a test of the technique over a wide range of flow conditions. The measured and calculated velocities in the supersonic jet core agree on average to within 1.3%. The uncertainty in the velocity measurement in the jet core was on average +/-6.0% for a single measurement and +/-3.5% for the average value of three scans. Potential errors caused by absorption effects were not detected in these measurements.
引用
收藏
页码:787 / 797
页数:11
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