阶梯溢流坝掺气水流运动的数值模拟

Numerical simulation of aerated flow on stepped spillway dam

从两相流基本方程出发,分析了水利工程中水气两相流的特点,采用QUICK格式对控制方程进行离散,建立了适用于自掺气水流的数学模型。应用此数学模型模拟计算了阶梯溢流坝面水气两相流的自由水面、流速场及初始掺气点等参数,并与模型试验实测结果进行对比分析,两者吻合较好。

Based on the basic equations of two-phase flow, the characteristics of the air-water two-phase flow are analyzed herein for hydraulic engineering, in which the control equation is discretized with QUICK Scheme, and then a mathematical equation suitable for the aerated flow is established. The parameters such as the free-water surface, flow velocity field and the initial aerated points etc. for the air-water two-phase flow on the surface of the stepped spillway are calculated with this mathematical model, for which a comparative analysis is made with the measured data form the model experiment concerned and it is demonstrated that both the results show a better agreement.