Aerothermodynamic methods for a Mars environmental survey Mars entry
Abstract
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 Marsentry 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 Marsentry 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.
 Publication:

Journal of Spacecraft and Rockets
 Pub Date:
 May 1994
 DOI:
 10.2514/3.26469
 Bibcode:
 1994JSpRo..31..516M
 Keywords:

 Aerodynamic Heating;
 Aerothermodynamics;
 Atmospheric Entry;
 Convective Heat Transfer;
 Mars Atmosphere;
 Transport Properties;
 Computational Fluid Dynamics;
 Mathematical Models;
 Nonequilibrium Flow;
 Stagnation Point;
 Thermodynamic Equilibrium;
 Astronautics (General)