Accession Number : AD0676161

Title :   HEAT EXCHANGE AND EQUILIBRIUM TEMPERATURE OF A SPHERE IN A SUPERSONIC STREAM OF RAREFIED GAS (TEPLOOBMEN I RAVNOVESNAYA TEMPERATURA SHARA V SVERKHZVUKOVOM POTOKE RAZREZHENNOGO GAZA),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Koshmarov,Yu. A. ; Gorskaya,N. M.

Report Date : 08 SEP 1967

Pagination or Media Count : 9

Abstract : Results of experimental investigations of the heat transfer and equilibrium temperature of a sphere in supersonic rarefied air flows are presented and the experimental setup and measuring techniques are described. The experiments were carried out with four spheres of electrolytic copper from 2.9 to 19.75 mm in diameter in a low-density wind tunnel. The experiments associated with investigation of the equilibrium temperature were separated into three groups according to Mach number: (1) M = 2.25 to 2.6; (2) 5.5 to 6.25; (3) 7.5 to 8 with the results presented as the dependence of the recovery coefficient r on R/M. The investigations of heat transfer were carried out in the Mach range from 6.2 to 6.35 and the results are presented as the dependence of the Nusselt number on the Reynolds number calculated with the sphere diameter and flow parameters behind a normal shock wave. A comparison of these results with data obtained by Drake, Becker, Eberley and Touryan shows good agreement. (Author)

Descriptors :   (*SPHERES, RAREFIED GAS DYNAMICS), (*RAREFIED GAS DYNAMICS, THERMODYNAMICS), HEAT TRANSFER, TEMPERATURE, SUPERSONIC CHARACTERISTICS, USSR

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE