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Base pressure associated with incompressible flow past wedges at high Reynolds numbersA model is suggested to study the viscid-inviscid interaction associated with steady incompressible flow past wedges of arbitrary angles. It is shown from this analysis that the determination of the nearly constant pressure (base pressure) prevailing within the near wake is really the heart of the problem and this pressure can only be determined from these interactive considerations. The basic free streamline flow field is established through two discrete parameters which should adequately describe the inviscid flow around the body and the wake. The viscous flow processes such as boundary-layer buildup along the wedge surface, jet mixing, recompression, and reattachment which occurs along the region attached to the inviscid flow in the sense of the boundary-layer concept, serve to determine the aforementioned parameters needed for the establishment of the inviscid flow. It is found that the point of reattachment behaves as a saddle point singularity for the system of equations describing the viscous recompression process. Detailed results such as the base pressure, pressure distributions on the wedge surface, and the wake geometry as well as the influence of the characteristic Reynolds number are obtained. Discussion of these results and their comparison with the experimental data are reported.
Document ID
19800027086
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Warpinski, N. R.
(Sandia Laboratories Albuquerque, N. Mex., United States)
Chow, W. L.
(Illinois, University Urbana, Ill., United States)
Date Acquired
August 10, 2013
Publication Date
September 1, 1979
Subject Category
Aerodynamics
Report/Patent Number
ASME PAPER 79-APM-31
Accession Number
80A11256
Funding Number(s)
CONTRACT_GRANT: NGL-14-005-140
CONTRACT_GRANT: DAAG29-76-G-0199
Distribution Limits
Public
Copyright
Other

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