Statistics – Computation
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jspro..31..516m&link_type=abstract
Journal of Spacecraft and Rockets (ISSN 0022-4650), vol. 31, no. 3, p. 516-523
Statistics
Computation
Aerodynamic Heating, Aerothermodynamics, Atmospheric Entry, Convective Heat Transfer, Mars Atmosphere, Transport Properties, Computational Fluid Dynamics, Mathematical Models, Nonequilibrium Flow, Stagnation Point, Thermodynamic Equilibrium
Scientific paper
Computational fluid dynamics models for the thermodynamics and transport properties used in an equilibrium version of the Langley aerothermodynamics upwind relaxation algorithm (LAURA) for Mars atmospheric entries are described. In addition, the physical models used in a nonequilibrium version of LAURA for Mars-entry flows are described. Uncertainties exist in defining constants used in the transport properties for the equilibrium model and in many of the physical models for the nonequilibrium version. Solutions from the two codes using the best available constants are examined at the Mars-entry conditions characteristics of the Mars environmental survey mission. While the flowfields are near thermal equilibrium, chemical nonequilibrium effects are present in the entry cases examined. Convective heating at the stagnation point for these flows (assuming fully catalytic wall boundary conditions) is approximately 100 W/cm(exp 2). Radiative heating is negligible.
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