用火焰面模型模拟甲烷/空气湍流射流扩散火焰  

SIMULATION OF METHANE/AIR TURBULENT JET DIFFUSION FLAME BY FLAMELET MODELS

作　　者：董刚[1] 王海峰[2] 陈义良[2] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]中国科学技术大学热科学和能源工程系,合肥230026

出　　处：《力学学报》2005年第1期73-79,共7页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家重点基础研究发展规划项目(G1999022207)南京理工大学校科研发展基金(AB41411).~~

摘　　要：以层流对撞扩散火焰为基础，利用层流火焰面模型(laminar flamelet model)的方法生成层流火焰面数据库，分别采用预先设定的几率密度函数(propabality density function，PDF)模型和混合物分数-湍流频率的联合几率密度函数输运模型，将火焰而方法应用于甲烷/空气湍流射流扩散火焰结构的模拟计算中．两个模型的计算结果和实验结果进行了比较和分析．Based on the laminar opposed-flow diffusion flame,a laminar flamelet database is generated usinglamianr flamelet model.The two different models,a presumed PDF model(Model Ⅰ)and a joint mixturefraction-turbulent frequency PDF transport model(Model Ⅱ),are coupled with the laminar flamelet modelto predict turbulent jet diffusion flame structure of methane/air.The calculated results for both of the PDFmodels are compared with measured results.The present study shows that the both of PDF models predictthe flow field well.In the prediction of scalar field,the Model Ⅰ totally shows the better results than Model Ⅱ.Finally,the improvements of Model Ⅱ are suggested for future investigation.

关 键 词：火焰面模型 几率密度函数 混合物分数 标量耗散率 湍流射流 扩散火焰 

分 类 号：O357.5[理学—流体力学]