Two dimension interferometric Rayleigh scattering velocimetry

Sheng Wang; Jin-hai Si; Jun Shao; Zhi-yun Hu

doi:10.1117/12.2244791

19 October 2016 Two dimension interferometric Rayleigh scattering velocimetry

Sheng Wang, Jin-hai Si, Jun Shao, Zhi-yun Hu

Proceedings Volume 10153, Advanced Laser Manufacturing Technology; 101530F (2016) https://doi.org/10.1117/12.2244791
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China

Abstract

In order to obtain the velocity with high dependability at extreme combustion condition, a 2-D interferometric Rayleigh scattering (IRS) velocimetry based on detecting the Doppler frequency shift of molecular scattering with Fabry–Perot etalon was developed. The 2-D IRS measurement system was set up with a multi-beam probe laser, aspherical lens collection optics, and a solid Fabry-Perot etalon. A multi-beam probe laser with 0.5mm intervals was formed by collimating a laser sheet passing through a cylindrical microlens arrays. The aspherical lens was used to enhance the intensity of Rayleigh scattering signal. The 2-D velocity results of a Mach 1.5 air flow were obtained. The velocity in the flow center is about 450 m/s. The reconstructed results are in accordance with the characteristic of flow, which indicates the validity of this technique.

Citation Download Citation

Sheng Wang, Jin-hai Si, Jun Shao, and Zhi-yun Hu "Two dimension interferometric Rayleigh scattering velocimetry", Proc. SPIE 10153, Advanced Laser Manufacturing Technology, 101530F (19 October 2016); https://doi.org/10.1117/12.2244791

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