A Conical Thin-Shock-Layer Theory Uniformly Valid in the Entropy Layer

Item

Title
A Conical Thin-Shock-Layer Theory Uniformly Valid in the Entropy Layer
Date
1965
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
FDL TDR 64-82
Creator
Melnik, Robert E.
Corporate Author
Grumman Aircraft Engineering Corporation
Laboratory
Air Force Flight Dynamics Laboratory
Extent
233
Identifier
AD0614444
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(657)-7313
DoD Project
8219
DoD Task
821902
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
This paper is concerned with the thin-shock-layer theory of hypersonic flow over general conical surfaces. A small parameter, E, representative of the density ratio across the shock wave is introduced and systematic expansions of the exact nonlinear equations of conical flow are constructed. By combining the method of 'inner and outer expansions' with the 'P.L.K.' method the author obtains a two layer solution and the associated composite expansion that is uniformly valid in the entropy layer. Formulas for the first two terms of the various expansions are given in terms of a number of quadratures. The discontinuities of entropy, density, and radial velocity appearing in the limit solution are replaced by regions of rapid variation in the uniformly valid solution. To illustrate the general character of the entropy layer corrections, the first order terms of the expansions were evaluated for two specific cases: the hypersonic flow over a slightly yawed circular cone, and the hypersonic flow in the vicinity of a conical symmetry plane. In both cases all integrations were carried out analytically and explicit solutions were obtained. For the case of a circular cone the present theory reproduced the first order results obtained by Cheng in an earlier analysis.
Report Availability
Full text available
Date Issued
1965-01
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Media
FDLTDR64-082.pdf