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Development and application of computational aerothermodynamics flowfield computer codesResearch was performed in the area of computational modeling and application of hypersonic, high-enthalpy, thermo-chemical nonequilibrium flow (Aerothermodynamics) problems. A number of computational fluid dynamic (CFD) codes were developed and applied to simulate high altitude rocket-plume, the Aeroassist Flight Experiment (AFE), hypersonic base flow for planetary probes, the single expansion ramp model (SERN) connected with the National Aerospace Plane, hypersonic drag devices, hypersonic ramp flows, ballistic range models, shock tunnel facility nozzles, transient and steady flows in the shock tunnel facility, arc-jet flows, thermochemical nonequilibrium flows around simple and complex bodies, axisymmetric ionized flows of interest to re-entry, unsteady shock induced combustion phenomena, high enthalpy pulsed facility simulations, and unsteady shock boundary layer interactions in shock tunnels. Computational modeling involved developing appropriate numerical schemes for the flows on interest and developing, applying, and validating appropriate thermochemical processes. As part of improving the accuracy of the numerical predictions, adaptive grid algorithms were explored, and a user-friendly, self-adaptive code (SAGE) was developed. Aerothermodynamic flows of interest included energy transfer due to strong radiation, and a significant level of effort was spent in developing computational codes for calculating radiation and radiation modeling. In addition, computational tools were developed and applied to predict the radiative heat flux and spectra that reach the model surface.
Document ID
19940030992
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Venkatapathy, Ethiraj (Eloret Corp. Palo Alto, CA, United States)
Date Acquired
September 6, 2013
Publication Date
July 14, 1994
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-196136
NAS 1.26:196136
Accession Number
94N35498
Funding Number(s)
CONTRACT_GRANT: NCC2-420
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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