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.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
1992年第4期309-311,共3页
Journal of Aerospace Power
