High-resolution OH LIF velocity measurement technique for high-speed reacting flowsA nonintrusive optical technique was developed for the quantitative study of velocity fields in steady, high-speed, reacting flows. A narrow-linewidth laser source was tuned through an isolated OH absorption line to measure the Doppler-shifted linecenter frequency relative to an iodine reference line. A counterpropagating beam approach was used to eliminate collisional impact shift effects. Pointwise measurements of velocity were made in a unique reacting underexpanded jet facility as an extensive calibration of the technique over a wide range of flow conditions. The extension of the technique to planar measurements is also discussed.
Document ID
19920066357
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Klavuhn, K. G. (NASA Langley Research Center Hampton, VA, United States)
Gauba, G. (NASA Langley Research Center Hampton, VA, United States)
Mcdaniel, J. C. (Virginia, University Charlottesville, United States)