| 模拟跨声速湍流的线性和非线性涡粘性湍流模式(英文) |
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| 作者姓名： | 杨晓东 马晖扬 |
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| 作者单位： | 中国科学院研究生院, 北京 100039 |
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| 基金项目： | theNationalNaturalScienceFoundationofChina(90205002) |
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| 摘 要： | 讨论应用线性和非线性涡粘性湍流模式计算跨声速湍流.用于比较的 3个线性湍流模式是Shih和Lumley的k ε模式,CMOTT模式和SST模式.2个非线性模式是Shih,Zhu和Lumleyd的二阶模式,以及Shih等的三阶模式.计算的典型流动是绕凸起的跨声速流动,该流动的特征是激波与边界层相互作用且伴有流动分离.计算结果表明非线性湍流模式具有明显的优势.
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| 关 键 词： | 跨声速流 湍流模式 涡粘性 |
Modelling of Turbulent Transonic Flows withLinear and Nonlinear Eddy2ViscosityTurbulence Models |
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| Authors: | YANG Xiao-Dong MA Hui-Yang |
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| Institution: | Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The predictive performance of linear and nonlinear eddy2viscosity turbulence models for homo-geneous shear flow and two transonic flows is presented. Three linear models are: k2E model of Shih &Lumley, CMOTT and SST model.Two nonlinear models are: the quadratic model of Shih, Zhu& Lumleyand the cubic model of Shih, et al.. The benchmark flows are two transonic flows over bump geometrieswith shock-wavePboundary2layer interaction including separation. The computational results demonstratethe superior performance of nonlinear models over the linear models. |
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| Keywords: | transonic flows turbulence models eddy2viscosity |
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