Advanced radiation calculations of hypersonic reentry flows using efficient databasing schemes

I. Sohn, A. Bansal, D. A. Levin, M. F. Modest

Research output: Contribution to journalArticlepeer-review

Abstract

Efficient schemes for databasing emission and absorption coefficients are developed to model radiation from hypersonic nonequilibrium flows. For bound-bound transitions, spectral information including the line-center wavelength and emission and absorption coefficients is stored for typical air plasma species. Since the flow is nonequilibrium, a rate equation approach including both collisional and radiatively induced transitions is used to calculate the electronic state populations, assuming quasi steady state. The general Voigt line-shape function is assumed for modeling the line-broadening. The accuracy and efficiency of the databasing scheme was examined by comparing results of the databasing scheme with those of NEQAIR for the Stardust flowfield. An accuracy of approximately 1% was achieved with an efficiency about three times faster than the NEQAIR code.

Original languageEnglish (US)
Pages (from-to)623-637
Number of pages15
JournalJournal of thermophysics and heat transfer
Volume24
Issue number3
DOIs
StatePublished - 2010
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science

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