旋流燃烧器出口湍流流场的数值模拟  

Numerical Simulation of Swirling Burners Outlet Gas Field with Different Turbulence Model

作　　者：倪建民[1] 陈云[2] 樊建人[1] 岑可法[1] 

机构地区：[1]浙江大学热能工程研究所,杭州310027 [2]杭州电子工学院,杭州310037

出　　处：《动力工程》2004年第1期102-105,共4页Power Engineering

摘　　要：对旋流燃烧器出口的湍流流场进行了深入的数值模拟研究,经过对不同旋流强度的旋转射流的计算,比较了对目前应用较多的k-ε模型、重正化群(RNG)的k-ε模型及雷诺应力模型在实际求解中的优劣。在弱旋气相流动时,RNGk-ε模型可以满足工程上的精度需求。在强旋流动中,基于"有效粘性"的各个模型的计算结果和实验相差很远,只有采用雷诺应力模型才能得到较为满意的结果。This article studies swirling burners gas field deeply with Numerical Simulation Method. The article presents three turbulence models (standard k-ε model, Renormalization Group k-ε Model and Reynolds Stress Model) which have been used widely at present, and then their merits/ shortcomings have been compared while being used to calculate swirling jets. When dealing with a low swirl number flow, the results by Renormalization Group (RNG) k-ε Model agree well enough with experiments. But when the swirl number is high, we have to resort to Reynolds Stress Model (RSM),because of the obvious differences between experimental and numberical results by the models based on 'effective viscosity'.Figs 4, tables 3 and refs 5.

关 键 词：动力机械工程 旋流燃烧器 数值模拟 湍流模型 

分 类 号：TK223.33[动力工程及工程热物理—动力机械及工程]