为研究不同大涡模拟湍流燃烧模型的性能,对比分析了不同大涡模拟(large eddy simulation,LES)燃烧模型在扩散火焰模拟中的计算性能,分别采用火焰面/反应进度变量(flamelet/progress variable,FPV),部分搅拌反应(partially stirred reactor,PaSR)和联合标量概率密度函数(transport joint possibility density function,PDF)燃烧模型对Sandia实验室的Flame D进行了数值模拟分析.计算结果与实验数据的对比表明:3种燃烧模型都可以较好地模拟扩散火焰.基于欧拉随机场的输运型PDF模型计算化学反应可以得到更加准确的结果,尤其是对中间组分OH和污染物NO的预测,但是计算量巨大;PaSR的计算速度和计算精度居中;FPV的方法在计算量上大大缩减,在工程应用中具有很大价值.%This study comparatively analyzes the calculation performances of different large-eddy simulation(LES) combustion models in a diffused flame simulation to investigate the performances of different LES-turbulent combus-tion models.The flamelet/progress variable(FPV),partially stirred reactor(PaSR),and transport joint possibili-ty density function(PDF)combustion model are adopted to perform a numerical simulation analysis for Flame D in the Sandia Lab.The comparison between the calculation results and the test data shows that the three models can properly simulate the diffused flame.The transport PDF model based on the Eulerian stochastic field method can re-alize better results,especially the forecast for the intermediate radicals(OH)and the pollutant emissions(NO). However,the calculation volume is huge.The calculation speed and precision of PaSR are acceptable.The FPV method can save much CPU time,and has great value in engineering applications.
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