Planar Doppler Velocimetry for Large-Scale Wind Tunnel ApplicationsPlanar Doppler Velocimetry (PDV) concepts using a pulsed laser are described and the obtainable minimum resolved velocities in large-scale wind tunnels are evaluated. Velocity-field measurements are shown to be possible at ranges of tens of meters and with single pulse resolutions as low as 2 m/s. Velocity measurements in the flow of a low-speed, turbulent jet are reported that demonstrate the ability of PDV to acquire both average velocity fields and their fluctuation amplitudes, using procedures that are compatible with large-scale facility operations. The advantages of PDV over current Laser Doppler Anemometry and Particle Image Velocimetry techniques appear to be significant for applications to large facilities.
Document ID
19980203994
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
McKenzie, Robert L. (NASA Ames Research Center Moffett Field, CA United States)