基于曲线网格的温排水运动数值模拟

采用平面二维数学模型对温排水运动进行数值模拟研究.首先建立了曲线网格上温排水运动控制方程的离散方法,该离散方法可在曲线网格上直接对直角坐标系下的控制方程进行离散,避免了以往离散过程中复杂的坐标变换,此外该离散格式既适用于正交曲线网格还适用于非正交曲线网格,对复杂边界的适应能力更强.最后采用长江城陵矶河段岳阳电厂实测资料进行验证计算,计算所得的水位、流速和温升与实测成果吻合较好.

Numerical simulation of cooling water based on curvilinear grids

The 2D depth-averaged mathematical model is employed to simulate the temperature rise of cooling water;and a new discretization idea is suggested to discretize the governing equations. The discretization method needs not to transform the governing equations into the curvilinear coordinates. Besides, this discretization algorithm can be applied to either orthogonal curvilinear grids or general curvilinear grids, which makes the algorithm to be more adaptable to complicated boundary. At last, the observed data of Yueyang Power Plant in Chenglingji Reach of the Yangtze River is used for verification; and the calculated water level, velocity and temperature rise are in agreement with the observed ones.