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Comparison of Euler and full potential marching techniques for flows over complex configurationsTwo recently developed aerodynamic prediction techniques based on the steady full potential equation and the unsteady Euler equations have been applied to a variety of three-dimensional supersonic flow problems exhibiting embedded subsonic regions. Both techniques utilize planar Gauss-Seidel relaxation in the marching direction and approximate factorization in the cross-flow plane. A conservative switching scheme and flux bias technique are employed in the full potential method to transition from the supersonic marching procedure to a subsonic relaxation algorithm and vice versa. A new unified approach with finite volume, high accuracy (up to third order) Total Variation Diminishing formulation (based on Roe's scheme) is used in the Euler solver. In the supersonic regions of the flow an 'infinitely large' time step is employed, and a finite time step is applied in the subsonic regions of the flow to reach the steady-state as a time-asymptote. Numerical solutions are obtained for a number of complex configurations, including: (1) an elliptic waverider, (2) a realistic fighter configuration, (3) the Space Shuttle, and (4) a Shuttle-like configuration. Both the Full Potential and Euler numerical results are in good agreement with available experimental data.
Document ID
19860041877
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Szema, K. Y.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Chakravarthy, S. R.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Shankar, V.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Byerly, J.
(Rockwell International Science Center Thousand Oaks, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 86-0244
Accession Number
86A26615
Funding Number(s)
CONTRACT_GRANT: NAS9-14000
CONTRACT_GRANT: NAS1-17492
CONTRACT_GRANT: NAS1-15820
Distribution Limits
Public
Copyright
Other

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