AN EMPIRICAL CORRELATION OF PRESSURE ON BLUNT-NOSED CYLINDRICAL AFTERBODIES AT HYPERSONIC MACH NUMBERS
Final rept. Jan 1961-Dec 1966
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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The study provided a readily solvable correlating equation that accurately predicts the pressure distribution over the afterbodies of various blunt-nosed cylinders at hypersonic Mach numbers. The correlating equation is developed from experimental pressure data on a cylinder with three nose shapes hemisphere, flat-face, and rounded-shoulder flat-face at free-stream Mach numbers of 6, 8, and 10. For blunt-nosed cylinders with nose drag coefficients from 0.89 to 1.72, the correlating equation is applicable over an extended experimental range of Mach number from 5.0 to 10.2 for local pressures greater than free-stream pressure. A good correlation is obtained with the method of characteristics solutions for Mach numbers from 5 to 100 for ten nose diameters along the body, but the applicability of the correlating equation beyond the experimental limits was not demonstrated.
- Fluid Mechanics