应用不同紊流模型的二维横向射流传热数值模拟研究  

Numerical Simulation of 2D Jet-to-Crossflow Heat Transfer with Different Turbulence Models

作　　者：吴海玲[1] 陈听宽[1] 罗毓珊[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2001年第9期903-907,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目 ( 5 995 4 60 - 3 )

摘　　要：为了研究紊流横向射流的流动与传热特征 ,基于控制容积法和协调一致的求解压力耦合方程的半隐方法 (SIMPLEC) ,应用标准k ε模型、重整化群 (RNG)k ε模型和易实现的 (Realizable)k ε模型 ,对射流与主流动量通量比为 0 .5～ 10 0的二维横向射流传热进行了数值模拟 .通过考察二维横向射流的平均流动和紊流特性 ,分析了回流区对射流下游壁面换热的影响 ,从流动机理角度解释了壁面换热峰值点位于重接触点近上游的现象 ,并结合横向射流特征讨论了 3种紊流模型的优劣 .计算结果表明 ,RNGk ε和Realizablek ε模型 ,尤其是Realizablek ε模型的预测值比标准k ε模型的预测值更为准确 .Based on a control-volume numerical procedure, utilizing the semi-implicit method for pressure-linked equations-consistent(SIMPLEC) pressure-velocity coupling arithmetic, using the standard κ-Ε model, renormalization group(RNG)κ-Ε model and realizable κ-Ε models, at the ratio of the jet to crossflow momentum flux of 0.5-10.0, numerical simulation was performed to investigate the flow and heat transfer characteristics of the turbulent jet-to-crossflow. The influence of the separate bubble on the heat transfer characteristics downstream of the jet was studied via analysis of the mean flow and turbulence field. The most intensive heat transfer takes place in upstream of the reattachment point, which was explained by the flow mechanism. Comparison of several turbulence models were presented based on the jet-to-crossflow characteristics. The result suggests that the later two models, especially the realizable κ-Ε model can predict more accurate than the standard κ-Ε model.

关 键 词：二维横向射流 紊流模型 数值模拟 传热特性 控制容积法 流动机理 

分 类 号：TK124[动力工程及工程热物理—工程热物理]