VELOCITY DECAY IN THE INTERMEDIATE WAKE REGION BEHIND HYPERSONIC SPHERES
CANADIAN ARMAMENT RESEARCH AND DEVELOPMENT ESTABLISHMENT (QUEBEC)
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Axial velocity decay data for hypersonic sphere wakes obtained with the sequential spark and probe array techniques were fitted with an equation of the form V sub wV sub infinity symbol C sub 1 XD raised to the power C sub 2. This power law is found to fit the data very well for axial distances between 300 and 1000 body diameters behind the body. Values of C sub 1 and C sub 2 obtained from sequential spark measurements are given as a function of radial distance from the wake axis. Near the axis, the absolute value of C sub 2 is slightly greater than unity, decreasing to about one-third at radial distances of about two body diameters.
- Fluid Mechanics