Laser Doppler Shift Velocimeter

摘要

Two different schemes for the laser doppler velocimeter are described and theoretically analyzed, a modified Mach-Zehnder velocimeter, and a modified Rayleigh velocimeter. Preliminary results obtained for the first scheme are shown and rather extensive results for the second scheme are presented. This latter method is shown to be capable under rather controlled conditions of obtaining speeds to well within 1%. Finally some results of a literature study concerning the use of laser doppler velocimetry as applied to the determination of the speed of wind tunnel flows are given. (Author)