Future Aerospace Ground Test Facility Requirements for the Arnold Engineering Development Center (1992) / Chapter Skim
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4 COMPUTATIONAL CAPABILITIES AND REQUIREMENTS
4 COMPUTATIONAL CAPABILITIES AND REQUIREMENTS
Pages 43-47
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From page 43... ...
The first function of supporting computing services at AEDC derives from the need of test support and management to operate a modern dataintensive ground test facility, to perform data reduction (including test corrections) , facility design (facility flow analysis)
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From page 44... ...
Most of the aerodynamic flows of interest to AEDC and its customers require consideration of one or more of the following phenomena: turbulence, flow separation, vortices, unsteadiness, and chemical reactions. One of the major goals of CFD at AEDC is numerical simulation of the aerodynamic flow over complete aircraft configurations and within rocket and turbine engines using the full RANS equations.
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From page 45... ...
To get some feeling for computing requirements, we note that it currently takes about 5 to 10 hours and 50 to 100 MW of memory to do a RANS simulation of a complete aircraft configuration using 1 million grid points, on a single processor CRAY YMP which has a peak speed of about 300 MFLOP. To have practical utility, RANS methods must be augmented with turbulence models that are effective for the particular problem under study.
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From page 46... ...
The committee finds that CFD based on the RANS equations is an emerging technology that will have increasing importance in ground testing applications. However, to achieve this potential at AEDC, RANS-based CFD technology requires advances in chemically reacting flows, turbulence modeling, and in geometry and and generation.
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From page 47... ...
According to Dongarra (1991) the fastest single processor computer could do the 100 by 100 all-FORTRAN LINPACK Benchmark with about 160 MFLOP compared to the minimum requirement of 35 MFLOP called out in the Advanced Scientific Computing Enhancement Program plan.
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