High Sampling-Rate Measurement Of Turbulence Velocity Fluctuations In Mach 1.8 Laval Jet Using Interferometric Rayleigh Scattering
CHINESE PHYSICS B(2017)
摘要
Interferometric Rayleigh scattering diagnostic technique for the time-resolved measurement of flow velocity is studied. Theoretically, this systematic velocity-measured accuracy can reach up to 1.23 m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic free jet from a Laval nozzle with a Mach number of 1.8 are also obtained quantitatively. The sampling rate in this measurement is determined to be approximately 10 kHz.
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关键词
Fabry-Perot interferometer,Rayleigh scattering,time-resolved velocity measurement,turbulence
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