Abstract
A new optical technique for the measurement of flow velocities with a laser interferometric technique was reported by Menn et al. (1981). Since then the technique has been improved and the authors describe the technique as well as a digital signal processing procedure which has been developed to computer the velocity components from the signal acquired. The method was used to measure velocity fluctuations and Reynolds stresses in an axisymmetric circular air jet. Experimental results are presented and compared with measurements of previous researchers.
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