TY - GEN
T1 - Study of emission turbulence-radiation interaction in hypersonic boundary layers
AU - Duan, L.
AU - Sohn, I.
AU - Grube, N.
AU - Martín, M. P.
AU - Levin, D. A.
AU - Modest, M. F.
PY - 2010
Y1 - 2010
N2 - We conduct large-eddy simulations (LES) to study the effects of emission turbulentradiation interaction (emission TRI) in hypersonic turbulent boundary layers, representative of the Orion crew exploration vehicle (CEV) at peak heating condition during reentry. A Quasi Steady State (QSS) model is used to generate electronic state populations for atomic radiating species. The effect of new electron impact ionization and excitation rates to QSS are investigated, particularly with respect to the modeling of electronic state distributions of atomic oxygen and nitrogen in the boundary layer. LES fields with and without emission coupling are considered. The uncoupled results show that emission TRI only subtly increases total emission, and the coupled results show that TRI has negligible influence on mean quantities (mean temperature, velocity and total emission) as well as turbulent kinetic energy, but significantly enhances the diminish of temperature fluctuations and total emission fluctuations.
AB - We conduct large-eddy simulations (LES) to study the effects of emission turbulentradiation interaction (emission TRI) in hypersonic turbulent boundary layers, representative of the Orion crew exploration vehicle (CEV) at peak heating condition during reentry. A Quasi Steady State (QSS) model is used to generate electronic state populations for atomic radiating species. The effect of new electron impact ionization and excitation rates to QSS are investigated, particularly with respect to the modeling of electronic state distributions of atomic oxygen and nitrogen in the boundary layer. LES fields with and without emission coupling are considered. The uncoupled results show that emission TRI only subtly increases total emission, and the coupled results show that TRI has negligible influence on mean quantities (mean temperature, velocity and total emission) as well as turbulent kinetic energy, but significantly enhances the diminish of temperature fluctuations and total emission fluctuations.
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M3 - Conference contribution
AN - SCOPUS:78649931156
SN - 9781600867392
T3 - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
BT - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
T2 - 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Y2 - 4 January 2010 through 7 January 2010
ER -