An improved instantaneous laser Doppler velocity system

Author: Desio Charles V   Olcmen Semih   Schinetsky Philip  

Publisher: IOP Publishing

E-ISSN: 1361-6501|27|2|25302-25311

ISSN: 0957-0233

Source: Measurement Science and Technology, Vol.27, Iss.2, 2016-02, pp. : 25302-25311

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Abstract

In this paper, improvements made on a single velocity component instantaneous laser Doppler velocimetry (ILDV) system are detailed. The ILDV system developed in this research effort is capable of measuring a single velocity component at a rate as high as two megahertz. The current system accounts for the effects of the laser intensity variation on the measured velocity and eliminates the use of a Pockels cell used in previous ILDV systems. The system developed in the current effort was tested using compressible, subsonic jet flows. The ILDV system developed would be most beneficial where a high data capture rate is needed such as in shock tubes, and high-speed wind tunnels.