A Real Time Interferometry System for Unsteady Flow Measurements
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A simple real-time interferometer system was developed for use in dynamic stall and other unsteady flow research at compressible flow speeds. A conventioned schlieren system was modified to operate as a point diffraction interferometer. The implementation of this interferometer is discussed and results of trails with different point diffractors are presented in this paper. The performance of the interferometer under various flow conditions was investigated. Results are presented which show the effects of the interferometer parameters such as pinhole size and pinhole-plate optical density on the performance of the system.
ICIAS '91 RECORD, IEEE Publication 91CH3028-8, pp. 423-430.
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