Accession Number : AD0631946

Title :   RADIATING HYPERVELOCITY COUETTE AND BOUNDARY LAYER FLOW IN AIR,

Corporate Author : BROWN UNIV PROVIDENCE R I DIV OF ENGINEERING

Personal Author(s) : Sibulkin,Merwin

Report Date : APR 1966

Pagination or Media Count : 28

Abstract : An analytical solution for high speed Couette flow of a gray gas is given for the situation in which the dominant physical mechanisms are the production of energy by viscous dissipation and its transfer by radiation. The analysis is extended to air for the non-gray, optically thin case including thermal conduction, and numerical results are presented to show the range of validity of the radiation controlled solution. The Couette flow results are then applied to the problem of the hypervelocity, laminar boundary layer on a flat plate in air. An approximate expression for the Planck mean absorption coefficient of air is used, and the results obtained confirm the hypotheses that these boundary layers will be optically thin and radiation controlled. The analysis results in simple expressions for estimating the boundary layer temperature and heat transfer coefficient. (Author)

Descriptors :   (*COUETTE FLOW, THERMAL RADIATION), (*BOUNDARY LAYER, THERMAL RADIATION), THICKNESS, OPTICAL PROPERTIES, LAMINAR FLOW, FLAT PLATE MODELS, AIR, HEAT TRANSFER COEFFICIENTS, NUMERICAL ANALYSIS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE