SIMULATION OF NOx FORMATION IN TURBULENT SWIRLINGCOMBUSTION USING A USM TURBULENCE—CHEMISTRY MODEL  

作　　者：周力行 乔丽 张健 

机构地区：[1]Department of Engineering Mechanics,State Key Laboratory of Clean Coal Combustion,Tsinghua University,Beijing 100084,China

出　　处：《Acta Mechanica Sinica》2003年第3期208-212,共5页力学学报（英文版）

基　　金：国家重点基础研究发展计划(973计划)

摘　　要：A unified second-order moment (USM) turbulence-chemistry model for simulating NOx formation in turbulent combustion is proposed.All of correlations,including the correlation of the reaction-rate coefficient fluctuation with the concentration fluctuation,are closed by the transport equations in the same form.This model discards the approximation of series expansion of the exponential function or the approximation of using the product of several 1-D PDF's instead of a joint PDF.It is much simpler than other refined models,such as the PDF transport equation model and the conditional moment closure model.The proposed model is used to simulate methane-air swirling turbulent combustion and NOx formation.The prediction results are in good agreement with the experimental results.

关 键 词：NOx 氮氧化物 涡流 紊流 燃烧 二次矩模型 USM 化学流体力学 数值模拟 密度分布函数 PDF 

分 类 号：O362[理学—流体力学] O643.21[理学—力学]