Accession Number : AD0429808


Title :   EFFECTS OF NONEQUILIBRIUM ON THE HYPERSONIC LAMINAR BOUNDARY LAYER,


Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS


Personal Author(s) : DeRienzo,P ; Berner,F ; Wood,A D ; Teare,J D


Report Date : Sep 1963


Pagination or Media Count : 29


Abstract : An approxiate method is formulated for the determination of the non-equilibrium compressible laminar boundary layer, both with and without the restriction of vibrational equilibrium. The method involves solution of the rate equations for species production and vibrational relaxation along effective particle paths determined from mass continuity considerations. The velocity and enthalpy time histories along these paths are then specified from the appropriate locally simialr equilibrium or frozen boundary layer analysis. Application of the method is illustrated for the hypersonic laminar boundary layer along a sharp cone. Results are compared with more exact numerical solutions of the nonequilibrium boundary layer equations, and the limitations of the approximate method are indicated. Finally, the technique is used to determine the effects of altitude and cone angle on the nonequilibrium boundary layer, together with the influence of variations in the chemical rate constants and vibrational relaxation models. The application of binary scaling is discussed. (Author)


Descriptors :   *HYPERSONIC FLOW , SLENDER BODIES , ATMOSPHERE ENTRY , ENTHALPY , VELOCITY , DIFFUSION , EQUATIONS OF STATE , INTEGRATION , HEAT TRANSFER , RELAXATION TIME


Distribution Statement : APPROVED FOR PUBLIC RELEASE