三维复杂区域对流换热问题的控制方程及计算

CALCULATION OF HEAT CONVECTION IN COMPLEX 3D GEOMETRIES

研究并发展了一套计算复杂区域对流换热问题的通用方法并开发了相应的可视化计算程序。针对所建立的一组以直角坐标速度分量表示的非正交曲线坐标系下的三维流动及传热控制方程，采用有限体积方法离散，ＳＩＭＰＬＥＲ算法求解，并利用网格界面速度插值方法解决采用非交错网格时出现的压力波动问题。本文利用所开发的程序计算了低散热发动机冷却通道自然对流换热问题。

A simulation method is presented for heat convection in 3D complex geometries.For a non-orthogonal coordinate formulation of the governing equations with cartesian velocity components,pressure and temperature,a finite volume method is utilized for discretization,SIMPLER algorithm is applied to pressure-velocity coupling,and the cell-face velocity interpolation method is employed for overcoming the pressure oscillations associated with the nonstaggered grid system.A visualization computing software is deve loped and applied to prediction of the heat convection in the cooling passage of low heat rejection engine.