Large Eddy Simulation of Scramjet Combustion Using a Subgrid Mixing/combustion Model

2003 ◽  
Author(s):  
Suresh Menon ◽  
Franklin Genin ◽  
Boris Chernyavsky
Keyword(s):  
Large Eddy Simulation ◽  
Combustion Model ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals A Fractal Dynamic SGS Combustion Model for Large Eddy Simulation of Turbulent Premixed Flames

2016 ◽  
Vol 188 (9) ◽  
pp. 1472-1495 ◽  
Author(s):  
Katsuhiro Hiraoka ◽  
Yuki Minamoto ◽  
Masayasu Shimura ◽  
Yoshitsugu Naka ◽  
Naoya Fukushima ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Premixed Flames ◽  
Combustion Model ◽  
Turbulent Premixed Flames ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Turbulent Premixed

Prediction of Premixed Flame Dynamics Using Large Eddy Simulation With Tabulated Chemistry and Eulerian Stochastic Fields

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
Alexander Avdonin ◽  
Alireza Javareshkian ◽  
Wolfgang Polifke
Keyword(s):  
Large Eddy Simulation ◽  
Time Series Data ◽  
Series Data ◽  
Combustion Model ◽  
Stochastic Fields ◽  
Progress Variable ◽  
Eddy Simulation ◽  
Flame Dynamics ◽  
Tabulated Chemistry ◽  
Large Eddy

Abstract This paper demonstrates that a large Eddy simulation (LES) combustion model based on tabulated chemistry and Eulerian stochastic fields can successfully describe the flame dynamics of a premixed turbulent swirl flame. The combustion chemistry is tabulated from one-dimensional burner-stabilized flamelet computations in dependence on progress variable and enthalpy. The progress variable allows to efficiently include a detailed reaction scheme, while the dependence on enthalpy describes the effect of heat losses on the reaction rate. The turbulence-chemistry interaction is modeled by eight Eulerian stochastic fields. An LES of a premixed swirl burner with a broadband velocity excitation is performed to investigate the flame dynamics, i.e., the response of heat release rate to upstream velocity perturbations. In particular, the flame impulse response and the flame transfer function (FTF) are identified from LES time series data. Simulation results for a range of power ratings are in good agreement with the experimental data.

Large-Eddy Simulation of Bluff-Body Flame Using the Equilibrium Combustion Model

2015 ◽  
Vol 29 (1) ◽  
pp. 179-189 ◽  
Author(s):  
Shafiq R. Qureshi ◽  
Waqar A. Khan ◽  
Robert Prosser
Keyword(s):  
Large Eddy Simulation ◽  
Bluff Body ◽  
Combustion Model ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Large Eddy Simulation of a Bluff Body Stabilized Lean Premixed Flame

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
A. Andreini ◽  
C. Bianchini ◽  
A. Innocenti
Keyword(s):  
Large Eddy Simulation ◽  
Gas Turbine ◽  
Turbulent Combustion ◽  
Bluff Body ◽  
Sensitivity Study ◽  
Flame Stabilization ◽  
Combustion Model ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Lean Premixed

The present study is devoted to verify current capabilities of Large Eddy Simulation (LES) methodology in the modeling of lean premixed flames in the typical turbulent combustion regime of Dry LowNOxgas turbine combustors. A relatively simple reactive test case, presenting all main aspects of turbulent combustion interaction and flame stabilization of gas turbine lean premixed combustors, was chosen as an affordable test to evaluate the feasibility of the technique also in more complex test cases. A comparison between LES and RANS modeling approach is performed in order to discuss modeling requirements, possible gains, and computational overloads associated with the former. Such comparison comprehends a sensitivity study to mesh refinement and combustion model characteristic constants, computational costs, and robustness of the approach. In order to expand the overview on different methods simulations were performed with both commercial and open-source codes switching from quasi-2D to fully 3D computations.

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