Accession Number : AD0482354

Title :   NEAR EQUILIBRIUM DISSOCIATING BOUNDARY LAYER FLOWS BY THE METHOD OF MATCHED ASYMPTOTIC EXPANSIONS.

Descriptive Note : Rept. for 1 Jul-31 Dec 65,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS

Personal Author(s) : Inger, G. R.

Report Date : MAR 1966

Pagination or Media Count : 28

Abstract : The approach to equilibrium in a nonequilibrium-dissociating boundary layer flow along catalytic or noncatalytic surfaces is treated from the stand-point of a singular perturbation problem and by use of the method of matched asymptotic expansions. Based on a linearized reaction rate model for a diatomic gas which facilitates closed form analysis, a uniformly valid solution for the near-equilibrium behavior is obtained as the composite of appropriate outer and inner solutions. It is shown that under near-equilibrium conditions, the primary nonequilibrium effects are buried in a thin sublayer near the body surface that is described by the inner solution. Applications of the theory are made to the prediction of heat transfer and atom concentrations for blunt body stagnation point and high speed flat plate flows; the results agree with the near-equilibrium behavior predicted by numerical solutions. (Author)

Descriptors :   *BOUNDARY LAYER), (*RAREFIED GAS DYNAMICS, FROZEN EQUILIBRIUM FLOW, GAS FLOW, SUPERSONIC FLOW, PERTURBATION THEORY, EQUILIBRIUM(PHYSIOLOGY), DISSOCIATION, STAGNATION POINT, HYPERSONIC CHARACTERISTICS, BLUNT BODIES, WALLS, FLAT PLATE MODELS, ASYMPTOTIC SERIES.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE