Accession Number : AD0612081

Title :   A MOMENT METHOD FOR COMPRESSIBLE LAMINAR BOUNDARY LAYERS AND SOME APPLICATIONS,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s) : Libby,Paul A. ; Fox,Herbert

Report Date : SEP 1964

Pagination or Media Count : 42

Abstract : An integral method based on moment techniques and especially useful for compressible laminar flows is presented. The describing partial differential equations are first transformed to the Levy-Lees variables and then converted to integral conditions with eta to the mth power as a weighing factor. A technique for handling the variation in transport properties which explicitly arises for m>0 is described. The resultant equations are applied for m=0,1 with the commonly employed fourth and fifth degree polynomial profiles for velocity and stagnation enthalpy. The distinct classification of similar and nonsimilar flows within the same analytic framework is emphasized. The analysis is applied to a variety of flows for which more accurate results are available and is found to yield satisfactory results in most cases. Therefore, the present method is considered to improve somewhat the conventional integral method (m=0) without excessive labor. (Author)

Descriptors :   (*LAMINAR BOUNDARY LAYER, COMPRESSIBLE FLOW), TRANSONIC FLOW, TRANSPORT PROPERTIES, HEAT TRANSFER, FRICTION, ENTHALPY, AERODYNAMIC HEATING, MATHEMATICAL ANALYSIS, INTEGRAL EQUATIONS, PARTIAL DIFFERENTIAL EQUATIONS, MOMENTS, MOMENTUM

Distribution Statement : APPROVED FOR PUBLIC RELEASE