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On computations of the integrated space shuttle flowfield using overset gridsNumerical simulations using the thin-layer Navier-Stokes equations and chimera (overset) grid approach were carried out for flows around the integrated space shuttle vehicle over a range of Mach numbers. Body-conforming grids were used for all the component grids. Testcases include a three-component overset grid - the external tank (ET), the solid rocket booster (SRB) and the orbiter (ORB), and a five-component overset grid - the ET, SRB, ORB, forward and aft attach hardware, configurations. The results were compared with the wind tunnel and flight data. In addition, a Poisson solution procedure (a special case of the vorticity-velocity formulation) using primitive variables was developed to solve three-dimensional, irrotational, inviscid flows for single as well as overset grids. The solutions were validated by comparisons with other analytical or numerical solution, and/or experimental results for various geometries. The Poisson solution was also used as an initial guess for the thin-layer Navier-Stokes solution procedure to improve the efficiency of the numerical flow simulations. It was found that this approach resulted in roughly a 30 percent CPU time savings as compared with the procedure solving the thin-layer Navier-Stokes equations from a uniform free stream flowfield.
Document ID
19900018418
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Chiu, I-T.
(Iowa State Univ. of Science and Technology Ames, IA, United States)
Pletcher, R. H.
(Iowa State Univ. of Science and Technology Ames, IA, United States)
Steger, J. L.
(Iowa State Univ. of Science and Technology Ames, IA, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1990
Subject Category
Space Transportation
Report/Patent Number
ISU-ERI-AMES-91040
NAS 1.26:186927
HTL-53
CFD-23
NASA-CR-186927
Report Number: ISU-ERI-AMES-91040
Report Number: NAS 1.26:186927
Report Number: HTL-53
Report Number: CFD-23
Report Number: NASA-CR-186927
Accession Number
90N27734
Funding Number(s)
CONTRACT_GRANT: NCC2-476
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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