不同湍流模型比较模拟撞击流  

Comparison among turbulence models for impinging jet flows

作　　者：邹春[1] 刘朝霞[1] 张立麒[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第9期72-74,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2004CB217703)

摘　　要：构造了计算撞击流流场分布的数值简化模型,并用有限容积法对间距为H的两个对置平板喷嘴间的湍流作用区域进行数值模拟研究.数值模拟采用了三种湍流模型:标准的k-ε模型、RNGk-ε模型(renormali-zation groupk-εmodel)以及雷诺应力模型.数值模拟数据的有效性通过将模拟结果与由对环境温度下两对置喷嘴之间的撞击流试验的结果比较得到证实.通过与实验数据的比较发现,由于考虑了平均流动中的旋转及旋流流动情况,RNGk-ε模型在撞击流区域获得的结果要好于用标准k-ε模型和雷诺应力模型获得的结果.The simplified model is proposed to calculate the distribution of the flow field of impinging stream. The turbulent interaction between two opposed plane jets separated by a distance of H was numerically simulated by a finite volume code. Three turbulent models, standard k-ε model, renormalization group k-ε model （RNG k-model） and second-order model, were simulated. The validation of the numerical study was tested by comparison of the results with experimental data obtained for the case of two interacting opposed jets at ambient temperature. The results show that RNG k-model, in which both the swirling of the averaged flows and the swirling flow were considered, gives a better result than that of standard k-ε model and second-order model in the interaction region.

关 键 词：湍流模型 撞击流 速度分布 射流 数值模拟 

分 类 号：O35[理学—流体力学]