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A nonlinear relaxation/quasi-Newton algorithm for the compressible Navier-Stokes equationsA highly efficient implicit method for the computation of steady, two-dimensional compressible Navier-Stokes flowfields is presented. The discretization of the governing equations is hybrid in nature, with flux-vector splitting utilized in the streamwise direction and central differences with flux-limited artificial dissipation used for the transverse fluxes. Line Jacobi relaxation is used to provide a suitable initial guess for a new nonlinear iteration strategy based on line Gauss-Seidel sweeps. The applicability of quasi-Newton methods as convergence accelerators for this and other line relaxation algorithms is discussed, and efficient implementations of such techniques are presented. Convergence histories and comparisons with experimental data are presented for supersonic flow over a flat plate and for several high-speed compression corner interactions. Results indicate a marked improvement in computational efficiency over more conventional upwind relaxation strategies, particularly for flowfields containing large pockets of streamwise subsonic flow.
Document ID
19920062886
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Edwards, Jack R.
(NASA Headquarters Washington, DC United States)
Mcrae, D. S.
(North Carolina State University Raleigh, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 92-2643
Meeting Information
Meeting: AIAA Applied Aerodynamics Conference
Location: Palo Alto, CA
Country: United States
Start Date: June 22, 1992
End Date: June 24, 1992
Accession Number
92A45510
Funding Number(s)
CONTRACT_GRANT: NAGW-1072
Distribution Limits
Public
Copyright
Other

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