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1. Two component LDV system with dual-differential acousto-optical frequency shift and its applications

Author

Yu Hesheng, Zhang Jingyi, Wang Zongsen, and Shen Xiong

Subjects
Physics, Turbulence, business.industry, Mechanical Engineering, Computational Mechanics, Reynolds number, Frequency shift, Velocimetry, Laser Doppler velocimetry, Physics::Fluid Dynamics, symbols.namesake, Optics, symbols, Duct (flow), Acoustic Doppler velocimetry, business, Wind tunnel
Abstract

This paper describes the main properties of the two component LDV system developed with the dual-differential frequency shift technique. It has the advantages of multiple functions, better SNR and high utilization of information. So it offers as a complete technique and method for measuring 2-D complex flows. By applying this system, 2-D turbulent separated flow measurements have been made in a duct with an asymmetrical sudden expansion and in a wind tunnel flow over a 2-D rib. The Reynolds numbers were at 5900 and 4500 respectively.

Published
1986

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