TY - GEN

T1 - Advanced radiation calculations of hypersonic reentry flows using efficient databasing schemes

AU - Sohn, I.

AU - Bansal, A.

AU - Levin, D. A.

AU - Modest, M. F.

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Efficient databasing schemes of emission and absorption coefficients are developed to model radiation from nonequilibrium gas flows. for bound-bound transitions, line information including line center wavelength and emission and absorption coefficients without the line shape factor is stored for typical air plasma species. Since the flow is in nonequi- librium, a rate equation approach including both collisional and radiatively induced transitions is used to calculate the electronic state populations. By using the quasi steady state assumption (QSS), the excited state populations of the nonequilibrium gas species are cal- culated in terms of flow temperature species concentrations, excitation cross sections, and radiative life times. The accuracy and efficiency of the databasing scheme are examined by comparing results of the databasing scheme with those of NEQAIR for the stardust flow field.

AB - Efficient databasing schemes of emission and absorption coefficients are developed to model radiation from nonequilibrium gas flows. for bound-bound transitions, line information including line center wavelength and emission and absorption coefficients without the line shape factor is stored for typical air plasma species. Since the flow is in nonequi- librium, a rate equation approach including both collisional and radiatively induced transitions is used to calculate the electronic state populations. By using the quasi steady state assumption (QSS), the excited state populations of the nonequilibrium gas species are cal- culated in terms of flow temperature species concentrations, excitation cross sections, and radiative life times. The accuracy and efficiency of the databasing scheme are examined by comparing results of the databasing scheme with those of NEQAIR for the stardust flow field.

UR - http://www.scopus.com/inward/record.url?scp=78049374503&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78049374503&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:78049374503

SN - 9781563479427

T3 - 40th AIAA Thermophysics Conference

BT - 40th AIAA Thermophysics Conference

T2 - 40th AIAA Thermophysics Conference

Y2 - 23 June 2008 through 26 June 2008

ER -