Technology and Spin-Offs From Doppler Global Velocimetry

The development of Doppler Global Velocimetry as a flow diagnostic measurement sy s t em nece s s i t a t ed seve ra l innova t i ons to so l ve problems found during wind tunnel testing. These innovations ranged from ratioing a data image with a reference image to remove scattered light variations, dewarping the images to remove optical distortions, and to the use of virtual wind tunnels created with 3-D computer animation technology to test potential optical configurations and present the result ing data . The paper descr ibes Doppler Global Velocimetry and its development through laboratory and wind tunnel investigations, and the various techniques used to solve the problems uncovered during these tests. Several of these solutions are presented as potential spin-offs that can enhance and improve a wide variety of global measurement technologies.