Measurement of turbulence velocity fluctuations in transonic wind tunnel using Interferometric Rayleigh Scattering diagnostic technique

Yang Furong; Chen Li; Yan Bo; Su Tie; Bao Weiyi; Chen Shuang

doi:10.11729/syltlx20170103

Volume 32 Issue 3

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Yang Furong, Chen Li, Yan Bo, et al. Measurement of turbulence velocity fluctuations in transonic wind tunnel using Interferometric Rayleigh Scattering diagnostic technique[J]. Journal of Experiments in Fluid Mechanics, 2018, 32(3): 82-86. doi: 10.11729/syltlx20170103

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Measurement of turbulence velocity fluctuations in transonic wind tunnel using Interferometric Rayleigh Scattering diagnostic technique

doi: 10.11729/syltlx20170103

Yang Furong^{1, 2
,},
Chen Li^{2
,
,},
Yan Bo²,
Su Tie²,
Bao Weiyi²,
Chen Shuang²

1.
Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of China Aerodynamics Research and Development Center, Sichuan Mianyang 621000, China
2.
China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

Received Date: 2017-08-14
Rev Recd Date: 2017-10-30
Publish Date: 2018-06-25

Abstract

Abstract

The interferometric Rayleigh scattering diagnostic technique for the time-resolved velocity measurement of the transonic wind tunnel is studied. The velocity-measurement apparatus, consisted of a CW laser, a high resolution Fabry-Pérot interferometer and a high-speed EMCCD camera, is designed. Rayleigh scattering light is produced as the flow irradiated by the laser. Then the light is collected and analyzed accurately by the Fabry-Pérot interferometer and the camera. Theoretically, this systematic velocity-measurement accuracy can reach 1.23m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic flow at Mach number 3.0 are obtained quantitatively. The sampling rate in this measurement reached about 4 kHz.
- Fabry-Pérot interferometer,
- Rayleigh scattering,
- time-resolved velocity measurement,
- transonic,
- turbulence intensity

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References(19)

References

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