Nonequilibrium infrared emission spectra representative of a Mars atmospheric entry mission are modeled using RADIS, a spectral code for CO and based on the HITEMP-2010 and CDSD-4000 databases. The modeled experimental data for the free-flow and the forebody radiation were obtained in the JAXA expansion tube facility. In the expanding flow, good agreement with the experimental data can be obtained using a slightly nonequilibrium distribution and a homogeneous flow. The model suggests that all three vibration modes share a same vibrational temperature slightly higher than the gas temperature. In the shock layer, the forebody radiation includes both and CO emission features. It can be correctly predicted by assuming thermal and chemical equilibrium at .
Analysis of the JAXA Nonequilibrium Infrared Emission Spectra for Mars Entry Conditions
Journal of Thermophysics and Heat Transfer ; 33 , 4 ; 1127-1131
2019-10-01
Article (Journal)
Electronic Resource
English
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