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Large-Eddy Simulation of Autoignition-Dominated Supersonic Combustion

Candler, Graham V. and Subbareddy, Pramod K. and Cymbalist, Niccolo and Dimotakis, Paul (2015) Large-Eddy Simulation of Autoignition-Dominated Supersonic Combustion. In: 45th AIAA Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics , Reston, VA, pp. 1-15. ISBN 978-1-62410-362-9. https://resolver.caltech.edu/CaltechAUTHORS:20181022-130026482

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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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2015-3340DOIArticle
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.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0064
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AIAA Paper2015-3340
Record Number:CaltechAUTHORS:20181022-130026482
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20181022-130026482
Official Citation:Large-Eddy Simulation of Autoignition-Dominated Supersonic Combustion. Graham V. Candler, Pramod K. Subbareddy, Niccolo Cymbalist, and Paul Dimotakis. 45th AIAA Fluid Dynamics Conference. Dallas, TX.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90326
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Oct 2018 21:20
Last Modified:03 Oct 2019 20:24

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