TURBULENT PREMIXED LES COMBUSTION MODELS BASED ON FRACTAL FLAME SURFACE DENSITY CONCEPTS

被引:0
作者
Allauddin, Usman [1 ]
Keppeler, Roman [1 ]
Pfitzner, Michael [1 ]
机构
[1] Univ Bundeswehr Munchen, Fak Luft & Raumfahrttech, Inst Thermodynam, D-85577 Neubiberg, Germany
来源
PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2014, VOL 4B | 2014年
关键词
LARGE-EDDY SIMULATION; WRINKLING MODEL; SCALE; INSTABILITY; GEOMETRY; FLOWS;
D O I
暂无
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
With increasing computational power, Large Eddy Simulation (LES) is being widely used to study and develop a better understanding of turbulent combustion. A variety of subgrid combustion models have been proposed to investigate premixed combustion in LES. One of the physical aspects that can be exploited, are the fractal characteristics of premixed flames which have been confirmed in several experimental works. In this work the performance of a simplified version of an already established sub-grid flame surface density combustion model, which is based on the fractal characteristics of the flame surface is investigated. The original model was derived on the basis of theoretical models, experimental and direct numerical simulations databases and its performance was validated with data from the available literature. The simplifications to the established flame surface density model are discussed, and its performance is validated in comparison to the original model. Secondly numerical simulations with both models at conditions typical for spark-ignition engines and industrial gas turbines are validated against experimental data. It is found that both original and simplified models are suitable for LES of low to high turbulent premixed combustion in ambient and elevated pressure conditions.
引用
收藏
页数:10
相关论文
共 53 条
[21]   A flame surface density approach to large-eddy simulation of premixed turbulent combustion [J].
Hawkes, ER ;
Cant, RS .
PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2000, 28 :51-58
[22]   Implications of a flame surface density approach to large eddy simulation of premixed turbulent combustion [J].
Hawkes, ER ;
Cant, RS .
COMBUSTION AND FLAME, 2001, 126 (03) :1617-1629
[23]   Large eddy simulation of turbulent combustion systems [J].
Janicka, J ;
Sadiki, A .
PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2005, 30 :537-547
[24]   Efficient generation of initial- and inflow-conditions for transient turbulent flows in arbitrary geometries [J].
Kempf, A ;
Klein, M ;
Janicka, J .
FLOW TURBULENCE AND COMBUSTION, 2005, 74 (01) :67-84
[25]  
Keppeler K., 2013, FLOW TURBULENC UNPUB
[26]   Examining the cascade hypothesis for turbulent premixed combustion [J].
Klimenko, AY .
COMBUSTION SCIENCE AND TECHNOLOGY, 1998, 139 (1-6) :15-40
[27]   A priori testing of a similarity model for large eddy simulations of turbulent premixed combustion [J].
Knikker, R ;
Veynante, D ;
Meneveau, C .
PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2002, 29 (02) :2105-2111
[28]  
Kobayashi H, 1996, TWENTY-SIXTH SYMPOSIUM (INTERNATIONAL) ON COMBUSTION, VOLS 1 AND 2, P389
[29]   Turbulence measurements and observations of turbulent premixed flames at elevated pressures up to 3.0 MPa [J].
Kobayashi, H ;
Nakashima, T ;
Tamura, T ;
Maruta, K ;
Niioka, T .
COMBUSTION AND FLAME, 1997, 108 (1-2) :104-117
[30]   Flame instability effects on the smallest wrinkling scale and burning velocity of high-pressure turbulent premixed flames [J].
Kobayashi, H ;
Kawazoe, H .
PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2000, 28 :375-382