An evaluation of computer codes for simulating the Galileo Probe aerothermal entry environment

Details An evaluation of computer codes for simulating the Galileo Probe aerothermal entry environment An evaluation of computer codes for simulating the Galileo Probe aerothermal entry environment

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981thph.confr....m&link_type=abstract

American Institute of Aeronautics and Astronautics, Thermophysics Conference, 16th, Palo Alto, CA, June 23-25, 1981, 25 p.

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Aerodynamic Heating, Atmospheric Entry, Computerized Simulation, Galileo Probe, Heat Shielding, Jupiter Atmosphere, Ablation, Aerodynamic Configurations, Computational Fluid Dynamics, Flow Distribution, Free Flow, Heat Transfer, Hypersonic Flight, Incident Radiation, Mass Transfer, Turbulence Effects, Turbulence Models

Scientific paper

The approaches of three computer flow field codes (HYVIS, COLTS, and RASLE), used to determine the Galileo Probe aerothermal environment and its effect on the design of the thermal protection system, are analyzed in order to resolve differences in their predicted results. All three codes account for the hypersonic, massively blown, radiation shock layers, characteristic of Jupiter entry. Significant differences, however, are evident in their solution procedures: the governing conservation equations, the numerical differencing methods, the governing physics (chemical, radiation, diffusion, and turbulence models), and the basic physical data (thermodynamic, transport, chemical, and spectral properties for atomic and molecular species). Solutions are compared for two near peak heating entry conditions for a Galileo Probe baseline configuration, having an initial mass of 242 kg and simulating entry into the Orton nominal atmosphere. The modern numerical methodology of COLTS and RASLE appear to provide an improved capability for coupled flow-field solutions.

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