CAJ | 학술논문

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κ-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.
토론응용선성화비선성와점성단류모식계산과성속단류.용우비교적3개선성단류모식시Shih화Lumley적κ-ε모식,CMOTT모식화SST모식.2개비선성모식시Shih,Zhu화Lumleyd적이계모식,이급Shih등적삼계모식.계산적전형류동시요철기적과성속류동,해류동적특정시격파여변계층상호작용차반유류동분리.계산결과표명비선성단류모식구유명현적우세.
The predictive performance of linear and nonlinear eddy-viscosity turbulence models for homogeneous shear flow and two transonic flows is presented. Three linear models are:k-ε model of Shih & Lumley, CMOTT and SST model. Two nonlinear models are: the quadratic model of Shih,Zhu & Lumley and the cubic model of Shih, et al.. The benchmark flows are two transonic flows over bump geometries with shock-wave/boundary-layer interaction including separation. The computational results demonstrate the superior performance of nonlinear models over the linear models.