轴对称弯道流动的N—S方程数值解  

VISCOUS FLOW FIELD PREDICTION IN AXISYMMETRIC PASSAGES

作　　者：张国庆 华耀南[1] 

机构地区：[1]中国科学院

出　　处：《航空动力学报》1992年第4期309-311,共3页Journal of Aerospace Power

摘　　要：利用涡量—流函数方法求解离心压气机进气弯道中的轴对称粘性流场。本文推导出了q—τ湍流模型方程在正交曲线坐标系下的表达式,并用以预测湍流流场。文中在涡量方程及q—τ方程中引进非定常项,采用时间推进法求解。通过对二维直通道及复杂边界的轴对称弯道内的层流、湍流流动的计算,获得了令人满意的结果。The viscous flow fields in the inflow axisymmetric passages of centrifugal compressors are predicted with vorticity- stream function (ω-ψ) method. The expressions of q-ω turbulence model equations in orthogonal curvilinear coordinate system are derived here, and they are used to predict the turbulent flow fields. The q-τ turbulence model has an advantage in capability of treating the boundary conditions. The unsteady terms are introduced in the τ-equation and q, τ equations, and the time-marching method is applied to solution of these equations. In the case of turbulent flow prediction the wall function is used in the near-wall region. Several numerical examples of laminar and turbulent flows in a 2D channel and axisymmetric passages with complex boundaries show that their solutions obtained with the present method is in good agreeement with their exact solution or their experimental data.

关 键 词：N-S方程 轴对称弯道 湍流 流场 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]