旋流燃烧器数值模拟中Realizable κ-ε和RSM模型的比较  

Comparison Between Realizable κ-ε and RSM Model in the Simulation for a Swirl Burner

作　　者：崔凯[1] 张海[1] 王卫良[1] 吴玉新[1] 杨海瑞[1] 吕俊复[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2012年第11期2006-2009,共4页Journal of Engineering Thermophysics

基　　金：国家863资助项目(No.2007AA05Z303)

摘　　要：使用RKE模型和RSM模型对某旋流燃烧器进行3D冷态湍流流动模拟计算,并从精度、计算量和收敛性3个方面对两个模型进行了比较。通过与PIV所测得的出口冷态流场对比表明,两个模型均可以较准确地预测燃烧器出口的宏观流场、径向速度和轴向速度分布。相比较而言,RSM模型在预报流场速度峰值的位置、回流区的大小、主流射流宽度等方面比RKE模型更准确一些,在收敛性上RSM模型也占优,而在计算量上,RSM模型略大一些,但对反应流计算,两个模型计算量基本一致。研究表明在模拟旋流燃烧器流场时RSM模型具有一定的优越性,建议优先考虑。RKE and RSM models were respectively used to numerically simulate the cold 3D turbuhmt flow field for a swirl burner. The comparison of the two models is performed according to their sinmlation accuracy, cost and convergence. Compared with PIV measurelnent results, both models are able to predict qualitatively the global flow fields as well as the axial and radial velocity distribution adjacent to the burner exit. Relatively, RSM model predicts more accurately the position of peak velocity, the shape and size of recirculation zone, and the width of the jet than RKE model. IH addition, tile sinmlation with RSM model has better convergence perfbrmance than that with RKE model. For the cold simulation, RSM model is slightly more costly but for the combustion sinnflation, the silnulation cost of two models is nearly the same. Consequently, RSM model prevails over RKE model in the simulation of a swirl burner and should be considered with higher propriety.

关 键 词：旋流燃烧器 湍流 Realizable κ-ε模型 RSM模型 数值模拟 

分 类 号：TK123[动力工程及工程热物理—工程热物理]