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Optical Engineering • Open Access

Two-dimensional interferometric Rayleigh scattering velocimetry using multibeam probe laser
Author(s): Wang Sheng; Jin-Hai Si; Shao Jun; Zhi-yun Hu; Jing-feng Ye; Jing-Ru Liu

Paper Abstract

In order to achieve the two-dimensional (2-D) velocity measurement of a flow field at extreme condition, a 2-D interferometric Rayleigh scattering (IRS) velocimetry using a multibeam probe laser was developed. The method using a multibeam probe laser can record the reference interference signal and the flow interference signal simultaneously. What is more, this method can solve the problem of signal overlap using the laser sheet detection method. The 2-D IRS measurement system was set up with a multibeam probe laser, aspherical lens collection optics, and a solid Fabry–Perot etalon. A multibeam probe laser with 0.5-mm intervals was formed by collimating a laser sheet passing through a cylindrical microlens arrays. The aspherical lens was used to enhance the intensity of the Rayleigh scattering signal. The 2-D velocity field results of a Mach 1.5 air flow were obtained. The velocity in the flow center is about 450    m / s . The reconstructed results fit well with the characteristic of flow, which indicate the validity of this technique.

Paper Details

Date Published: 7 March 2017
PDF: 5 pages
Opt. Eng. 56(11) 111705 doi: 10.1117/1.OE.56.11.111705
Published in: Optical Engineering Volume 56, Issue 11
Show Author Affiliations
Wang Sheng, Xi’an Jiaotong Univ. (China)
State Key Lab. of Laser Interaction with Matter, Northwest Institute of Nuclear Technology (China)
Jin-Hai Si, Xi'an Jiaotong Univ. (China)
Shao Jun, State Key Lab. of Laser Interaction with Matter, Northwest Institute of Nuclear Technology (China)
Zhi-yun Hu, State Key Lab. of Laser Interaction with Matter, Northwest Institute of Nuclear Technology (China)
Jing-feng Ye, State Key Lab. of Laser Interaction with Matter, Northwest Institute of Nuclear Technology (China)
Jing-Ru Liu, State Key Lab. of Laser Interaction with Matter, Northwest Institute of Nuclear Technology (China)


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