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Complete supersonic flowfields over blunt bodies in a generalized orthogonal coordinate systemA general orthogonal coordinate system is used to describe various axisymmetric and two-dimensional shapes. Close approximations to planetary probe configurations are possible. The full Navier-Stokes equations are discretized in this coordinate system in a manner based on Allen and Cheng's numerical procedure. The blow shock is treated as a discontinuity which floats between grid points. Completely coupled flows over the forebody, base, and near wake were calculated over a cylinder, sphere, and an approximation to the Viking Aeroshell. Some problem areas in determining the base flow for increasing Reynolds number are discussed. In particular, it is found that the mean free path of the fluid near the wall immediately below the corner of the Viking Aeroshell, which experiences a severe expansion, can become greater than the local mesh size required to resolve the boundary layer in the forebody.
Document ID
19800012045
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Gnoffo, P. A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
September 17, 1979
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
LOG-J11338
NASA-TM-81784
Report Number: LOG-J11338
Report Number: NASA-TM-81784
Accession Number
80N20529
Funding Number(s)
PROJECT: RTOP 506-51-13-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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