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Multi-scalek-distribution model for gas mixtures in hypersonic nonequilibrium flows

Authors
Journal
Journal of Quantitative Spectroscopy and Radiative Transfer
0022-4073
Publisher
Elsevier
Publication Date
Volume
112
Issue
7
Identifiers
DOI: 10.1016/j.jqsrt.2010.09.012
Keywords
  • Hypersonics
  • Plasma Radiation
  • Nonequilibrium
Disciplines
  • Physics

Abstract

Abstract A k-distribution model is presented for gas mixtures in thermodynamic nonequilibrium, containing strongly radiating atomic species N and O together with molecular species of N 2, N 2 +, NO and O 2. In the VUV range of the spectrum there is strong absorption of atomic radiation by bands of N 2. For this spectral range, a multi-scale model is presented, where RTEs are solved separately for each emitting species and overlap with other species is treated in an approximate way. Methodology for splitting the gas mixture into scales and evaluation of the overlap parameter between different scales is presented. The accuracy of the new model is demonstrated by solving the radiative transfer equation along the stagnation line flow field of the Crew Exploration Vehicle (CEV).

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