Multifidelity Framework for Modeling Combustion Dynamics
Open Access
- 1 May 2019
- journal article
- research article
- Published by American Institute of Aeronautics and Astronautics (AIAA) in AIAA Journal
- Vol. 57 (5), 2055-2068
- https://doi.org/10.2514/1.j057061
Abstract
A multifidelity framework oriented toward efficient modeling of combustion dynamics that integrates a reduced-order model (ROM) for the combustion response into the Euler equations is proposed. The ROM is developed from computational fluid dynamics (CFD) simulations of a combusting flow that is periodically forced at the boundaries of a reduced domain. Galerkin’s method is used to reduce the high-order partial differential equations to a low-order ordinary differential equation system via proper orthogonal decomposition eigenbases generated from a reduced-domain dataset. Evaluations of the framework are performed based on parametric studies of a simplified test problem for a model combustor showing distinguishable combustion instability behavior. Two-way information transfer between the ROM and Euler solutions is accomplished by interface matching at the boundaries of the reduced domain. It is shown that accurate predictions require the use of multiple ROMs to account for both upstream- and downstream-traveling perturbations. Characteristic boundary conditions are required at both reduced-domain boundaries to minimize wave reflections and preclude generic unstable responses in the multifidelity model predictions. Comparisons with CFD solutions show the multifidelity model is capable of capturing overall instability trends.Keywords
Funding Information
- U.S. Air Force Academy (#108055)
This publication has 40 references indexed in Scilit:
- Exploration of combustion instability triggering using Large Eddy Simulation of a multiple injector liquid rocket engineCombustion and Flame, 2016
- Linear stability and adjoint sensitivity analysis of thermoacoustic networks with premixed flamesCombustion and Flame, 2016
- Prediction of combustion instability limit cycle oscillations by combining flame describing function simulations with a thermoacoustic network modelCombustion and Flame, 2015
- Coupling between hydrodynamics, acoustics, and heat release in a self-excited unstable combustorPhysics of Fluids, 2015
- Wall-temperature effects on flame response to acoustic oscillationsProceedings of the Combustion Institute, 2015
- Combining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustorCombustion and Flame, 2013
- Large Eddy Simulations of gaseous flames in gas turbine combustion chambersProgress in Energy and Combustion Science, 2012
- Experimental analysis of nonlinear flame transfer functions for different flame geometriesProceedings of the Combustion Institute, 2009
- A unified framework for nonlinear combustion instability analysis based on the flame describing functionJournal of Fluid Mechanics, 2008
- A GENERALIZED MODEL OF ACOUSTIC RESPONSE OF TURBULENT PREMIXED FLAME AND ITS APPLICATION TO GAS-TURBINE COMBUSTION INSTABILITY ANALYSISCombustion Science and Technology, 2005