Accession Number : AD0687860

Title :   VISCOUS EFFECTS OF BLUNT CONES AT LOW REYNOLDS NUMBERS AND HYPERSONIC SPEEDS.

Descriptive Note : Final rept. Dec 67-Jan 69,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Gregorek,Gerald M.

Report Date : JAN 1969

Pagination or Media Count : 131

Abstract : Pressure and heat transfer rates on spherically-blunted 10 and 25 deg half angle cones at zero angle-of-attack were measured in a continuous flow hypersonic wind tunnel. At a nominal Mach number of 10, and Reynolds number between 3500 and 9700, based on free stream conditions and nose diameter, measured surface pressures were as high as 25% above the values predicted by solutions from the method of characteristics. A Tangent-Blunt-Cone analysis was formulated by coupling a local similarity boundary layer theory with the inviscid blunt cone solutions; use of this theory improved predictions to boundary layer theory at the higher stream densities; however, at Re < 5000, corrections to account for transverse curvature on the 10 deg cone and stream vorticity on the 25 deg cone were required to bring predicted and observed values into agreement. (Author)

Descriptors :   (*CONICAL BODIES, HYPERSONIC CHARACTERISTICS), REYNOLDS NUMBER, BLUNT BODIES, VISCOSITY, PRESSURE, HEAT TRANSFER, ANGLE OF ATTACK, BOUNDARY LAYER

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE