TY - GEN
T1 - Large-eddy simulation of autoignition-dominated supersonic combustion
AU - Candler, Graham V.
AU - Cymbalist, Niccolo
AU - Dimotakis, Paul E.
N1 - Publisher Copyright:
© 2015, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - The simulation of low-speed combustion flows is well established. However, at highspeed conditions where radical formation and ignition delay are important, there is much less experience with turbulent combustion modeling. In the present work, a novel evolution variable manifold (EVM) approach of Cymbalist and Dimotakis1,2 is implemented in a production CFD code and preliminary RANS and large-eddy simulations are computed for a hydrogen combustion test case. The EVM approach solves a scalar conservation equation for the induction time to represent ignition delay. The state of the combustion products is tabulated as a function of density, energy, mixture fraction, and the evolution variable. A thermodynamically-consistent numerical flux function is developed and the approach for coupling the EVM table to CFD is discussed. Initial simulations show that the EVM approach produces good agreement with full chemical kinetics model simulations. Work remains to be done to improve the numerical stability, extend the grid, and increase the order of accuracy of the simulations.
AB - The simulation of low-speed combustion flows is well established. However, at highspeed conditions where radical formation and ignition delay are important, there is much less experience with turbulent combustion modeling. In the present work, a novel evolution variable manifold (EVM) approach of Cymbalist and Dimotakis1,2 is implemented in a production CFD code and preliminary RANS and large-eddy simulations are computed for a hydrogen combustion test case. The EVM approach solves a scalar conservation equation for the induction time to represent ignition delay. The state of the combustion products is tabulated as a function of density, energy, mixture fraction, and the evolution variable. A thermodynamically-consistent numerical flux function is developed and the approach for coupling the EVM table to CFD is discussed. Initial simulations show that the EVM approach produces good agreement with full chemical kinetics model simulations. Work remains to be done to improve the numerical stability, extend the grid, and increase the order of accuracy of the simulations.
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U2 - 10.2514/6.2015-3340
DO - 10.2514/6.2015-3340
M3 - Conference contribution
AN - SCOPUS:85088063419
SN - 9781624103629
T3 - 45th AIAA Fluid Dynamics Conference
BT - 45th AIAA Fluid Dynamics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 45th AIAA Fluid Dynamics Conference, 2015
Y2 - 22 June 2015 through 26 June 2015
ER -