基于LES的射流火焰湍流辐射交互作用研究  

Turbulence-radiation interaction in turbulent jet flame based on large-eddy simulation

作　　者：宋绪光 金捷[1,2,3] 张敏琦 王方 SONG Xuguang;JIN Jie;ZHANG Minqi;WANG Fang(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;Jiangxi Research Institute,Beihang University,Nanchang 330096,China;Chengdu Innovation Research Institute on Aircraft Power of Beihang University,Chengdu 611930,China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]北京航空航天大学江西研究院,南昌330096 [3]北京航空航天大学成都航空动力创新研究院,成都611930

出　　处：《北京航空航天大学学报》2024年第8期2667-2676,共10页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家科技重大专项(2017-Ⅰ-0004-0005);国家自然科学基金(91741125)。

摘　　要：在大涡模拟中,研究了亚格子湍流辐射交互作用(SGS-TRI)对Sandia Flame D和Flame 4D(Scaled Sandia flame D)辐射源项的影响。模拟中,采用概率密度函数输运方程(TPDF)湍流燃烧模型模拟湍流燃烧过程,球谐函数(P1近似)法、灰气体加权和模型(WSGGM)模拟辐射换热。采用湍流涡团光学薄脉动近似(OTFA)处理滤波吸收项,分别采用考虑和忽略SGS-TRI的方法求解滤波发射项。结果显示,SGS-TRI仅在辐射源项本身数值较小的区域对时均辐射源项有相对较大的影响(最大为25%);考虑和忽略SGS-TRI计算得到的时均温度以及CO_(2)浓度等径向分布基本重合(相对差别小于3%)。因此,亚格子湍流辐射交互作用对无碳烟湍流射流火焰(Flame D和Flame 4D)的影响较小。In large eddy simulation(LES),the influence of subgrid-scale turbulence-radiation interaction(SGSTRI)on the radiative source term for Sandia Flame D and the scaled Sandia flame D(Flame 4D)was studied.The transport probability density function(TPDF)method was used to simulate the turbulence combustion,and the spherical harmonics(P1 approximation)method and the weighted-sum-of-gray-gases model(WSGGM)were employed to simulate the radiation heat transfer.The optically thin fluctuation approximation(OTFA)of the turbulent vortex group was applied for processing the filtered absorption term,and different methods considering or omitting the SGS-TRI were used for solving the filtered emission term.The results show that the SGS-TRI has a relatively large effect on the time-averaged radiation source term(up to 25%)only in areas where the source term itself is small.The radial distributions of the time-averaged temperature and CO_(2)concentration calculated by considering and ignoring the SGS-TRI largely overlap(The relative difference is less than 3%).Therefore,the influence of SGS-TRI on the non-sooting turbulent jet flames(Flame D and Flame 4D)is small.

关 键 词：湍流辐射交互作用 亚格子 大涡模拟 概率密度函数输运方程模型 辐射传热 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]