火焰增厚燃烧模型计算旋转预混火焰的参数敏感性分析
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摘要
为了分析各种参数对火焰增厚(TF)模型的影响,并找出各个参数在火焰增厚模型中最佳的适用范围,采用该模型对PRECCINSTA燃烧器内的湍流预混旋转火焰进行了大涡模拟研究,并针对TF模型的主要影响因素:火焰厚度网格数、褶皱函数、动态增厚过程,开展了一系列的敏感性对比计算。研究表明:采用了动态增厚过程的TF计算结果与实验结果的吻合度有明显的提高;如果将层流火焰的厚度增加过大,达到10倍网格尺度,则会对正确预测湍流与火焰的相互作用带来较大困难,对于本文所研究的火焰,火焰厚度网格数的理想范围是2.5~5.0;采用固定指数的幂律褶皱函数相比于传统的Colin褶皱函数并没有明显的改善。
In order to analyze the effects of each parameter on the thickened-flame(TF)model,and find out the best range of each parameter in the this model,large eddy simulation(LES)of turbulent premixed swirling flames in the PRECCINSTA burner is performed with TF model. A sensitivity study of the model is conducted,for which several factors affecting the performance of TF model are investigated: the flame thickness grid number,the wrinkling function,a dynamic thickening procedure,etc.The investigation shows that the LES results obtained with the dynamic thickening procedure agree better with the experiment data. If the flame front is thickened to 10 times grid size,it becomes difficult for LES to predict the interaction between turbulence and flame correctly. For the flames under consideration in this paper,the ideal range of flame thickness grid number is 2.5~5. Furthermore,compared to the traditional Colin wrinkling function,the LES results obtained with power law wrinkling function with fixed index do not show a noticeable improvement.
In order to analyze the effects of each parameter on the thickened-flame(TF)model,and find out the best range of each parameter in the this model,large eddy simulation(LES)of turbulent premixed swirling flames in the PRECCINSTA burner is performed with TF model. A sensitivity study of the model is conducted,for which several factors affecting the performance of TF model are investigated: the flame thickness grid number,the wrinkling function,a dynamic thickening procedure,etc.The investigation shows that the LES results obtained with the dynamic thickening procedure agree better with the experiment data. If the flame front is thickened to 10 times grid size,it becomes difficult for LES to predict the interaction between turbulence and flame correctly. For the flames under consideration in this paper,the ideal range of flame thickness grid number is 2.5~5. Furthermore,compared to the traditional Colin wrinkling function,the LES results obtained with power law wrinkling function with fixed index do not show a noticeable improvement.
引文
[1]Fiorina B,Veynante D,Candel S.Modeling Combustion Chemistry in Large Eddy Simulation of Turbulent Flames[J].Flow Turbulence Combustion,2015,94:3-42.
[2]Strakey P A,Eggenspieler G.Development and Validation of a Thickened Flame Modeling Approach for Large Eddy Simulation of Premixed Combustion[J].Journal of Engineering for Gas Turbines and Power,2010,132.
[3]杨帆,林博颖,隋春杰,等.湍流强旋流预混火焰大涡模拟研究[J].工程热物理学报,2015,4:895-900.
[4]Franzelli B,Riber E,Gicquel L Y M,et al.Large Eddy Simulation of Combustion Instabilities in a Lean Partially Premixed Swirled Flame[J].Combustion and Flame,2012,159(2):621-637.
[5]张科,明涛,罗坤,等.基于动态全增厚火焰模型对甲烷/空气非预混燃烧的大涡模拟[J].工程热物理学报,2012,33:1823-1826.
[6]Boudier G,Gicquel L Y M,Poinsot T.Effects of Mesh Resolution on Large Eddy Simulation of Reacting Flows in Complex Geometry Combustors[J].Combustion and Flame,2008,155(1):196-214.
[7]Kuenne G,Ketelheun A,Janicka J.LES Modeling of Premixed Combustion Using a Thickened Flame Approach Coupled with FGM Tabulated Chemistry[J].Combustion and Flame,2011,158(9):1750-1767.
[8]Colin O,Ducros F,Veynante D,et al.A Thickened Flame Model for Large Eddy Simulations of Turbulent Premixed Combustion[J].Physics of Fluids,2000,12(7):1843-1863.
[9]Martin C E,Benoit L,Sommerer Y,et al.Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor[J].AIAA Journal,2006,44(4):741-750.
[10]Legier J P,Poinsot T,Veynante D.Dynamically Thickened Flame LES Model for Premixed and Non-Premixed Turbulent Combustion[C].Stanford University:Proceedings of the CTR Summer Program,2000:157-168.
[11]Wang P,Fr?hlich J,Maas U.Impact of Location and Flow Rate Oscillation of the Pilot Jet on the Flow Structures in Swirling Premixed Flames[J].Journal of Turbulence,2010,11(11):1-19.
[12]Charlette F,Meneveau C,Veynante D.A Power-Law Flame Wrinkling Model for LES of Premixed Turbulent Combustion,Part I:Non-Dynamic Formulation and Initial Tests[J].Combustion and Flame,2002,149(1):159-180.
[13]王蔡军,陆少杰,王平.基于REDIM方法构建的亚网格燃烧模型及其应用[J].化工学报,2015,66(12):4948-4959.
[14]Selle L,Lartigue G,Poinsot T,et al.Compressible Large Eddy Simulation of Turbulent Combustion in Complex Geometry on Unstructured Meshes[J].Combustion and Flame,2004,137(4):489-505.
[15]Wang P,Fr?hlich J,Maas U,et al.A Detailed Comparison of Two Sub-Grid Scale Combustion Models Via Large Eddy Simulation of the PRECCINSTA Gas Turbine Model Combustor[J].Combustion and Flame,2016,164(2):329-345.
[16]李磊,孙晓峰.推进动力系统燃烧不稳定性产生的机理,预测及控制方法[J].推进技术,2010,31(6):710-720.(LI Lei,SUN Xiao-feng.The Mechanism of Combustion Instability Prediction and Control Method of Propulsion System[J].Journal of Propulsion Technology,2010,31(6):710-720.)
[17]邓远灏,颜应文,朱嘉伟,等.LPP低污染燃烧室两相喷雾燃烧数值研究[J].推进技术,2013,34(3):353-361.(DENG Yuan-hao,YAN Ying-wen,ZHU Jia-wei,et al.Two-Phase Spray Combustion Numerical Study in LPP Low Pollution Combustion Chamber[J].Journal of Propulsion Technology,2013,34(3):353-361.)
[18]张济民,韩超,张宏达,等.钝体绕流有旋流中回流区与进动涡核的大涡模拟[J].推进技术,2014,35(8):1070-1079.(ZHANG Ji-min,HAN Chao,ZHANG Hong-da,et al.Large Eddy Simulation of Swirl Flow Around Bluff Body with Central Recirculation Zone and Precession Vortex Core[J].Journal of Propulsion Technology,2014,35(8):1070-1079.)
[19]Charlette F,Meneveau C,Veynante D.A Power-Law Flame Wrinkling Model for LES of Premixed Turbulent Combustion,Part II:Dynamic Formulation[J].Combustion and Flame,2002,131(1):181-197.
[2]Strakey P A,Eggenspieler G.Development and Validation of a Thickened Flame Modeling Approach for Large Eddy Simulation of Premixed Combustion[J].Journal of Engineering for Gas Turbines and Power,2010,132.
[3]杨帆,林博颖,隋春杰,等.湍流强旋流预混火焰大涡模拟研究[J].工程热物理学报,2015,4:895-900.
[4]Franzelli B,Riber E,Gicquel L Y M,et al.Large Eddy Simulation of Combustion Instabilities in a Lean Partially Premixed Swirled Flame[J].Combustion and Flame,2012,159(2):621-637.
[5]张科,明涛,罗坤,等.基于动态全增厚火焰模型对甲烷/空气非预混燃烧的大涡模拟[J].工程热物理学报,2012,33:1823-1826.
[6]Boudier G,Gicquel L Y M,Poinsot T.Effects of Mesh Resolution on Large Eddy Simulation of Reacting Flows in Complex Geometry Combustors[J].Combustion and Flame,2008,155(1):196-214.
[7]Kuenne G,Ketelheun A,Janicka J.LES Modeling of Premixed Combustion Using a Thickened Flame Approach Coupled with FGM Tabulated Chemistry[J].Combustion and Flame,2011,158(9):1750-1767.
[8]Colin O,Ducros F,Veynante D,et al.A Thickened Flame Model for Large Eddy Simulations of Turbulent Premixed Combustion[J].Physics of Fluids,2000,12(7):1843-1863.
[9]Martin C E,Benoit L,Sommerer Y,et al.Large-Eddy Simulation and Acoustic Analysis of a Swirled Staged Turbulent Combustor[J].AIAA Journal,2006,44(4):741-750.
[10]Legier J P,Poinsot T,Veynante D.Dynamically Thickened Flame LES Model for Premixed and Non-Premixed Turbulent Combustion[C].Stanford University:Proceedings of the CTR Summer Program,2000:157-168.
[11]Wang P,Fr?hlich J,Maas U.Impact of Location and Flow Rate Oscillation of the Pilot Jet on the Flow Structures in Swirling Premixed Flames[J].Journal of Turbulence,2010,11(11):1-19.
[12]Charlette F,Meneveau C,Veynante D.A Power-Law Flame Wrinkling Model for LES of Premixed Turbulent Combustion,Part I:Non-Dynamic Formulation and Initial Tests[J].Combustion and Flame,2002,149(1):159-180.
[13]王蔡军,陆少杰,王平.基于REDIM方法构建的亚网格燃烧模型及其应用[J].化工学报,2015,66(12):4948-4959.
[14]Selle L,Lartigue G,Poinsot T,et al.Compressible Large Eddy Simulation of Turbulent Combustion in Complex Geometry on Unstructured Meshes[J].Combustion and Flame,2004,137(4):489-505.
[15]Wang P,Fr?hlich J,Maas U,et al.A Detailed Comparison of Two Sub-Grid Scale Combustion Models Via Large Eddy Simulation of the PRECCINSTA Gas Turbine Model Combustor[J].Combustion and Flame,2016,164(2):329-345.
[16]李磊,孙晓峰.推进动力系统燃烧不稳定性产生的机理,预测及控制方法[J].推进技术,2010,31(6):710-720.(LI Lei,SUN Xiao-feng.The Mechanism of Combustion Instability Prediction and Control Method of Propulsion System[J].Journal of Propulsion Technology,2010,31(6):710-720.)
[17]邓远灏,颜应文,朱嘉伟,等.LPP低污染燃烧室两相喷雾燃烧数值研究[J].推进技术,2013,34(3):353-361.(DENG Yuan-hao,YAN Ying-wen,ZHU Jia-wei,et al.Two-Phase Spray Combustion Numerical Study in LPP Low Pollution Combustion Chamber[J].Journal of Propulsion Technology,2013,34(3):353-361.)
[18]张济民,韩超,张宏达,等.钝体绕流有旋流中回流区与进动涡核的大涡模拟[J].推进技术,2014,35(8):1070-1079.(ZHANG Ji-min,HAN Chao,ZHANG Hong-da,et al.Large Eddy Simulation of Swirl Flow Around Bluff Body with Central Recirculation Zone and Precession Vortex Core[J].Journal of Propulsion Technology,2014,35(8):1070-1079.)
[19]Charlette F,Meneveau C,Veynante D.A Power-Law Flame Wrinkling Model for LES of Premixed Turbulent Combustion,Part II:Dynamic Formulation[J].Combustion and Flame,2002,131(1):181-197.