High-speed camera-based measurement system for aeroacoustic investigations

摘要

The interaction of sound and flow enables an efficient noise damping. Inevitable for understanding\udof this aeroacoustic damping phenomenon is the simultaneous measurement of flow and sound fields. Optical\udsensor systems have the advantage of non-contact measurements. The necessary simultaneous determination of\udsound levels and flow velocities with high dynamic range has major hurdles. We present an approach based\udon frequency-modulated Doppler global velocimetry, where a high-speed CMOS camera with data rates over\ud160 MSampless