Research on application of Rayleigh scattering velocity measurement in hypersonic low density wind tunnel

Chen Aiguo; Chen Li; Li Zhihui; Li Zhonghua; Yang Furong; Li Sixin; Yan Bo

doi:10.11729/syltlx20170020

Volume 31 Issue 6

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Journal of Experiments in Fluid Mechanics > 2017 > 31(6): 51-55. > DOI: 10.11729/syltlx20170020

Chen Aiguo, Chen Li, Li Zhihui, Li Zhonghua, Yang Furong, Li Sixin, Yan Bo. Research on application of Rayleigh scattering velocity measurement in hypersonic low density wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(6): 51-55. DOI: 10.11729/syltlx20170020

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Research on application of Rayleigh scattering velocity measurement in hypersonic low density wind tunnel

1.
Hypervelocity Aerodynamics Research Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China
2.
Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

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Received Date: February 21, 2017
Revised Date: July 02, 2017

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Abstract

The velocity and turbulence level of Mach 5, 6 and 12 flow fields have been measured in the Φ0.3m hypersonic low density wind tunnel by the Rayleigh scattering principle using a Fabry-Perot interferometer. The application of the Rayleigh scattering measuring system in the velocity measurement of the hypersonic flow field is understood and realized. The turbulence level of the wind tunnel is below 1%, and the maximum deviation between the velocity measurement result and the flow-field calibration is 1.3%. The velocity in the flow field around the re-entry module after the shock wave has also been measured. The experimental result of the Mach 6 incoming flow is in agreement with numerical simulation results, but in the case of the Mach 12 incoming flow the deviation is 69%, and the reason is analyzed. It is found that through the experiment a certain condensation exists in the Φ0.3m hypersonic low density wind tunnel. Further research scheme is suggested.
- hypersonic,
- wind tunnel,
- Rayleigh scattering,
- velocity measurement

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