TY - GEN
T1 - Reduced-order modeling for non-equilibrium air flows
AU - Munafò, Alessandro
AU - Venturi, Simone
AU - Sharma, Maitreyee P.
AU - Panesi, Marco
N1 - Funding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) (Grant No. FA9550-18-1-0388 DEF, P.O. Dr. Ivett Leyva). The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the U.S. government.
Funding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) (Grant No. FA9550-18-1-0388 DEF, P.O. Dr. Ivett Leyva). The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the AFOSR or the U.S. government. The authors gratefully acknowledge Prof. J. M. Austin at California Institute of Technology for providing the grid of the T5 facility nozzle.
Publisher Copyright:
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2020
Y1 - 2020
N2 - This work deals with the development and application of reduced-order models for nonequilibrium hypersonic air flows. Starting from a State-to-State formulation, the reduction of kinetics mechanism to a more tractable form for Computational-Fluid-Dynamics (CFD) applications is realized by grouping the atom/molecule internal states within bins with prescribed population distributions. The group/bin-averaged kinetic parameters (e.g., rate coefficients) are computed in conjunction with Quasi-Classical-Trajectory (QCT) calculations. This allows for treating diatom-diatom systems (e.g., N2-N2) for which a State-to-State method is simply impractical. The proposed physico-chemical models are first compared against State-to-State formulations in zero and one-dimensional configurations to assess their accuracy, and later applied to realistic multi-dimensional simulations to demonstrate their maturity and predictive capabilities.
AB - This work deals with the development and application of reduced-order models for nonequilibrium hypersonic air flows. Starting from a State-to-State formulation, the reduction of kinetics mechanism to a more tractable form for Computational-Fluid-Dynamics (CFD) applications is realized by grouping the atom/molecule internal states within bins with prescribed population distributions. The group/bin-averaged kinetic parameters (e.g., rate coefficients) are computed in conjunction with Quasi-Classical-Trajectory (QCT) calculations. This allows for treating diatom-diatom systems (e.g., N2-N2) for which a State-to-State method is simply impractical. The proposed physico-chemical models are first compared against State-to-State formulations in zero and one-dimensional configurations to assess their accuracy, and later applied to realistic multi-dimensional simulations to demonstrate their maturity and predictive capabilities.
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U2 - 10.2514/6.2020-1226
DO - 10.2514/6.2020-1226
M3 - Conference contribution
AN - SCOPUS:85091908559
SN - 9781624105951
T3 - AIAA Scitech 2020 Forum
BT - AIAA Scitech 2020 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2020
Y2 - 6 January 2020 through 10 January 2020
ER -