TY - GEN
T1 - Uncertainty quantification study of non-equilibrium viscous shock-layer
AU - Kino, Takumi
AU - Totani, Kosuke
AU - Ishihara, Tomoaki
AU - Ogino, Yousuke
AU - Ohnishi, Naofumi
N1 - Publisher Copyright:
© 2015 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - Uncertainty quantification and sensitivity analysis for a high enthalpy flow were per- formed using thermochemical nonequilibrium models of the air. Parameters of chemical kinetic rates and relaxation time for two-temperature model were chosen as input uncer- tainties. As a result of the uncertainty analysis, those input uncertainties do not have significant in uences on the convective heat ux for the present conditions. However, stan- dard deviation of temperature distributions has a different tendency between the models. Moreover, global sensitivity analysis using Sobol’ indices was performed, and it is found that sensitivities for temperature are strongly related to the forward reaction rates of O2 dissociation and the relaxation time of N2 molecules near the shock front, while the forward reaction rates of O2 and relaxation time of N2 are responsible for the sensitivity near the wall.
AB - Uncertainty quantification and sensitivity analysis for a high enthalpy flow were per- formed using thermochemical nonequilibrium models of the air. Parameters of chemical kinetic rates and relaxation time for two-temperature model were chosen as input uncer- tainties. As a result of the uncertainty analysis, those input uncertainties do not have significant in uences on the convective heat ux for the present conditions. However, stan- dard deviation of temperature distributions has a different tendency between the models. Moreover, global sensitivity analysis using Sobol’ indices was performed, and it is found that sensitivities for temperature are strongly related to the forward reaction rates of O2 dissociation and the relaxation time of N2 molecules near the shock front, while the forward reaction rates of O2 and relaxation time of N2 are responsible for the sensitivity near the wall.
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U2 - 10.2514/6.2015-0983
DO - 10.2514/6.2015-0983
M3 - Conference contribution
AN - SCOPUS:85088357712
SN - 9781624103438
T3 - 53rd AIAA Aerospace Sciences Meeting
BT - 53rd AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 53rd AIAA Aerospace Sciences Meeting, 2015
Y2 - 5 January 2015 through 9 January 2015
ER -