High sampling-rate measurement of turbulence velocity fluctuations in Mach 1.8 Laval jet using interferometric Rayleigh scattering Project supported by the National Natural Science Foundation of China (Grant No. 11272337)

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,...

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Bibliographic Details
Published in:Chinese physics B 2017-02, Vol.26 (2)
Main Authors: Chen, Li, Yang, Fu-Rong, Su, Tie, Bao, Wei-Yi, Yan, Bo, Chen, Shuang, Li, Ren-Bing
Format: Article
Language:English
Subjects:
Fabry-Pérot interferometer
Rayleigh scattering
time-resolved velocity measurement
turbulence
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Summary: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.
ISSN:1674-1056
DOI:10.1088/1674-1056/26/2/025205