Accession Number:

AD0600540

Title:

ASYMPTOTIC FLOW PATTERN OF A HYPERSONIC BODY.

Descriptive Note:

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s):

Report Date:

1964-03-01

Pagination or Media Count:

62.0

Abstract:

A theoretical investigation of the steady, continuum, inviscid flow pattern at large distances downstream of finite hypersonic bodies is presented. Specifically, blunt nosed plates and cylinders representative of actual bodies and associated wakes are considered. Asymptotic solutions are obtained for perfect gas flows at infinite Mach number. It is shown that a the flows in question are not self-preserving automodel b asymptotic description thereof can be obtained by the method of matched expansions in conjunction with standard matching principles c the asymptotic behavior of the bow shock is described by the law ya sub oxm 1a sub 1 x N sub 1... with the exponent m23nu, in accord with the blast wave analogy, and the exponent N sub 1-m1nu gamma-1gamma, gamma being the isentropic exponent of the gas. Considerations are qualitatively extended to the analysis of flows at large but finite Mach numbers it is indicated that a general feature thereof is the appearance of secondary trailing shocks for both twodimensional and axisymmetric configurations. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE