Accession Number : AD0622802

Title :   PRESSURES ON CIRCULAR CYLINDERS IN EQUILIBRIUM AND NONEQUILIBRIUM HYPERSONIC AIR FLOWS.

Descriptive Note : Final rept. for 1 Jan 63-31 Mar 65,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS AERODYNAMIC LAB

Personal Author(s) : Petrie,S. L. ; Gregorek,G. M.

Report Date : AUG 1965

Pagination or Media Count : 34

Abstract : Pressure distributions on circular cylinders were measured in arc-heated and perfect gas wind tunnels. The flow Mach numbers were near 7 at Reynolds numbers based on cylinder diameter from 160 to 1000. The stagnation enthalpies varied from 250 to 5050 BTU/lb sub m. For locations on the cylinder beyond 20 degrees from the stagnation point, the pressures determined in the perfect gas tunnel were found to be higher than those obtained from the arc-heated wind tunnel. Various possible causes for the discrepancies in pressures are examined. The results indicate the possible existence of rotational nonequilibrium in the cylinder shock layer for the high enthalpy tests. (Author)

Descriptors :   (*HYPERSONIC WIND TUNNELS, EFFECTIVENESS), (*CYLINDRICAL BODIES, HYPERSONIC FLOW), (*AERODYNAMIC LOADING, CYLINDRICAL BODIES), ATMOSPHERE ENTRY, SIMULATION, REENTRY VEHICLES, STAGNATION POINT, ENTHALPY, WIND TUNNELS, NONEQUILIBRIUM FLOW, PRESSURE, BLUNT BODIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE