Nonequilibrium effects in high enthalpy gas flows expanding through nozzles

2021 ◽  
Vol 33 (10) ◽  
pp. 106104
Author(s):  
Sergey F. Gimelshein ◽  
Ingrid J. Wysong
Keyword(s):  
Gas Flows ◽  
High Enthalpy ◽  
Nonequilibrium Effects

Nonequilibrium effects on high-enthalpy expansions of air.

AIAA Journal ◽  
1965 ◽  
Vol 3 (10) ◽  
pp. 1972-1974 ◽  
Author(s):  
J. A. LORDI ◽  
R. E. MATES
Keyword(s):  
High Enthalpy ◽  
Nonequilibrium Effects

Heterogeneous catalytic recombination reactions including energy accommodation considerations in high enthalpy gas flows

1997 ◽  
Author(s):  
Thomas Stoeckle ◽  
Monika Auweter-Kurtz ◽  
Stefanos Fasoulas ◽  
Thomas Stoeckle ◽  
Monika Auweter-Kurtz ◽  
...  
Keyword(s):  
Gas Flows ◽  
High Enthalpy ◽  
Heterogeneous Catalytic ◽  
Energy Accommodation ◽  
Catalytic Recombination ◽  
Recombination Reactions

The interaction of a shock wave with a laminar boundary layer at a compression corner in high-enthalpy flows including real gas effects

1997 ◽  
Vol 342 ◽  
pp. 1-35 ◽  
Author(s):  
S. G. MALLINSON ◽  
S. L. GAI ◽  
N. R. MUDFORD
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Shock Wave ◽  
Gas Flows ◽  
Perfect Gas ◽  
Experimental Conditions ◽  
Real Gas ◽  
High Enthalpy ◽  
Compression Corner ◽  
Real Gas Effects

The high-enthalpy, hypersonic flow over a compression corner has been examined experimentally and theoretically. Surface static pressure and heat transfer distributions, along with some flow visualization data, were obtained in a free-piston shock tunnel operating at enthalpies ranging from 3 MJ kg−1 to 19 MJ kg−1, with the Mach number varying from 7.5 to 9.0 and the Reynolds number based on upstream fetch from 2.7×104 to 2.7×105. The flow was laminar throughout. The experimental data compared well with theories valid for perfect gas flow and with other relevant low-to-moderate enthalpy data, suggesting that for the current experimental conditions, the real gas effects on shock wave/boundary layer interaction are negligible. The flat-plate similarity theory has been extended to include equilibrium real gas effects. While this theory is not applicable to the current experimental conditions, it has been employed here to determine the potential maximum effect of real gas behaviour. For the flat plate, only small differences between perfect gas and equilibrium gas flows are predicted, consistent with experimental observations. For the compression corner, a more rapid rise to the maximum pressure and heat transfer on the ramp face is predicted in the real gas flows, with the pressure lying slightly below, and the heat transfer slightly above, the perfect gas prediction. The increase in peak heat transfer is attributed to the reduction in boundary layer displacement thickness due to real gas effects.

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