An Overview of Doppler Global Velocimetry

A basic overview of Doppler Global Velocimetry (DGV) is provided with respect to potential measurement applications. DGV, a relatively new method, is presently undergoing development and evaluation at a number of research labs. A discussion of current DGV theory, system specifications, measurement capabilities, and development activities is provided. DGV problems, challenges, and solutions unique to the method will be outlined. At this point it appears likely that DGV systems will see increased application in wind tunnels. Like other laser based measurement methods, DGV will be principally handicapped by factors related to flow seeding.