Simultaneous measurements of temperature and density in air flows using UV laser spectroscopyThe simultaneous measurement of temperature and density using laser-induced fluorescence of oxygen in combination with Q-branch Raman scattering of nitrogen and oxygen is demonstrated in a low-speed air flow. The lowest density and temperature measured in the experiment correspond to the freestream values at Mach 5 in the Ames 3.5-Foot Hypersonic Wind Tunnel for stagnation conditions of 100 atm and 1000 K. The experimental results demonstrate the viability of the optical technique for measurements that support the study of compressible turbulence and the validation of numerical codes in supersonic and hypersonic wind tunnel flows.
Document ID
19910036874
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fletcher, D. G. (NASA Ames Research Center Moffett Field, CA, United States)
Mckenzie, R. L. (NASA Ames Research Center Moffett Field, CA, United States)