Date of Graduation
Statler College of Engineering and Mineral Resources
Mechanical and Aerospace Engineering
John M. Kuhlman.
A two-component Doppler global velocimetry (DGV) system has been developed, improved, and tested. DGV is a non-intrusive optical velocity measurement technique. DGV measures the Doppler shift of the frequency of the light scattered by seed particles at a specific location. The velocity of the particles is related to the Doppler shift.;DGV measurements were made in the WVU low speed wind tunnel on a turbulent jet and on a NACA 2412 airfoil model with and without tip blowing.;The jet data generally agreed well with previous measurements. The jet velocity error was generally within +/-2--4 m/s. The offset error of up to +/-10 m/s was attributed to difficulties in cell calibration. The velocity data obtained from the airfoil measurements was limited to the regions of space where the gray levels were high enough to yield meaningful results. In these regions, the observed error was comparable to that of the jet.
Starn, Andrew Douglas, "Doppler global velocimetry measurements in a wing flow field with tip blowing" (2004). Graduate Theses, Dissertations, and Problem Reports. 1466.