Wall-Modeled Large-Eddy Simulation of Autoignition-Dominated Supersonic Combustion
Abstract
Simulations of combustion in high-speed and supersonic flows need to account for autoignition phenomena, compressibility, and the effects of intense turbulence. In the present work, the evolution-variable manifold framework of Cymbalist and Dimotakis ("On Autoignition-Dominated Supersonic Combustion," AIAA Paper 2015-2315, June 2015) is implemented in a computational fluid dynamics method, and Reynolds-averaged Navier–Stokes and wall-modeled large-eddy simulations are performed for a hydrogen–air combustion test case. As implemented here, the evolution-variable manifold approach solves a scalar conservation equation for a reaction-evolution variable that represents both the induction and subsequent oxidation phases of combustion. The detailed thermochemical state of the reacting fluid is tabulated as a low-dimensional manifold as a function of density, energy, mixture fraction, and the evolution variable. A numerical flux function consistent with local thermodynamic processes is developed, and the approach for coupling the computational fluid dynamics to the evolution-variable manifold table is discussed. Wall-modeled large-eddy simulations incorporating the evolution-variable manifold framework are found to be in good agreement with full chemical kinetics model simulations and the jet in supersonic crossflow hydrogen–air experiments of Gamba and Mungal ("Ignition, Flame Structure and Near-Wall Burning in Transverse Hydrogen Jets in Supersonic Crossflow," Journal of Fluid Mechanics, Vol. 780, Oct. 2015, pp. 226–273). In particular, the evolution-variable manifold approach captures both thin reaction fronts and distributed reaction-zone combustion that dominate high-speed turbulent combustion flows.
Additional Information
© 2017 by Graham V. Candler. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Presented as Paper 2015-3340 at the 45th AIAA Fluid Dynamics Conference, Dallas, TX, 22–25 June 2015; received 28 July 2016; revision received 15 December 2016; accepted for publication 3 January 2017; published online 13 April 2017. This work was sponsored by the U.S. Air Force Office of Scientific Research (AFOSR) Grant FA9550-12-1-0461. We would like to thank Mirko Gamba for providing the code to compute the hydroxyl radical planar laser-induced fluorescence images. 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.Attached Files
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Additional details
- Eprint ID
- 78028
- DOI
- 10.2514/1.J055550
- Resolver ID
- CaltechAUTHORS:20170608-100338274
- Air Force Office of Scientific Research (AFOSR)
- FA9550-12-1-0461
- Created
-
2017-06-08Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2015-3340