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Published June 2015 | Published
Book Section - Chapter Open

Large-Eddy Simulation of Autoignition-Dominated Supersonic Combustion

Abstract

The simulation of low-speed combustion flows is well established. However, at high-speed 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 Dimotakis is implemented in a production CFO 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 or 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 and model simulations. Work remains to be done to improve the numerical stability, extend the grid, and increase the order or accuracy of the simulations.

Additional Information

© 2015 Graham V. Candler. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. This work was sponsored by the Air Force Office of Scientific Research under grants FA9550-12-1-0064. The views and conclusions contained herein are those of the author 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.

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Published - Candler_CD.2015.AIAAP.LES_of_Autoignition-Dominated_Supersonic_Combustio.._.pdf

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Additional details

Created:
September 15, 2023
Modified:
October 23, 2023