Accession Number : AD0717825

Title :   The Effect of Edge Bluntness of a Flat Plate on Heat Transfer in a Supersonic Flow,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kozlov,L. V.

Report Date : 02 DEC 1970

Pagination or Media Count : 14

Abstract : The effect of edge bluntness of a flat plate on heat transfer is experimentally investigated in the region where anisotropic conditions do not exist on the limit of the boundary layer. The experiments were carried out by means of a wind tunnel having a 110 x 110 mm test section with nozzle velocities in the Mach range from 2 to 4 M. Heat transfer was evaluated on a flat plate with cylindrical bluntness in a range of a given relative bluntness. The dependence of the nondimensional heat-transfer coefficient on the Reynolds number is illustrated in a graph. The data obtained with a blunt-edged flat plate are compared with those obtained on a sharp-edged flat plate. The distribution of local heat fluxes on both plates is presented in graphical form and shows that at given large ratios the local value of the heat flux on a blunt-edged plate is always smaller than on a sharp-edged plate, but in a given vicinity the boundary layer builds up faster. An analysis of the results shows that the effect of bluntness increases with the Mach number. (Author)

Descriptors :   (*BLUNT BODIES, SUPERSONIC CHARACTERISTICS), (*HEAT TRANSFER, FLAT PLATE MODELS), LEADING EDGES, SHOCK WAVES, FLOW FIELDS, VELOCITY, PRESSURE, BOUNDARY LAYER, WIND TUNNEL MODELS, MATHEMATICAL MODELS, HEAT FLUX, STATISTICAL DISTRIBUTIONS, USSR

Subject Categories : Aerodynamics
      Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE