Investigation of the Effects of Nose Bluntness on Natural and Induced Boundary-Layer Transition on Axisymmetric Bodies in Supersonic Flow
Open Access
- 1 February 1973
- report
- Published by Defense Technical Information Center (DTIC)
Abstract
A series of tests has been conducted at free-stream Mach numbers four and eight to determine the effectiveness of three-dimensional boundary-layer trips in promoting transition on very blunt axisymmetric bodies with near equilibrium wall temperatures. Temperature distributions obtained with temperature sensing gages inserted in the model surface were used to locate boundary-layer transition at Mach number four, and qualitative results, based on pitot pressure measurements, were obtained at Mach number eight. A simple modification of a technique proposed by van Driest and Blummer for determining an effective trip size for blunt bodies is shown to yield a correlation applicable to their data on a sphere at Mach number two and the present configurations at Mach number four.Keywords
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