过水围堰溢洪的全域三维数值模拟

3-D Numerical Simulation of Overflow on Overtopped Cofferdams Universe

过水围堰由于涉及范围广、边界复杂,溢洪的全域三维数值模拟还较为欠缺。为实现物理模型与数值计算的互补,采用紊流模型对上、下游过水围堰及基坑,包括部分河道进行了三维数值模拟。给出典型工况围堰的泄流能力,消能平台水气两相流特性,以及三维流场和压力分布。上游水位与围堰泄流量的关系,计算与实测进行了对比分析,大洪水工况时二者吻合较好,小洪水工况时有一定偏差。研究表明:顺水流方向结构化网格的生成,使模拟的过堰水流与实际情况更为相符。

The research report about 3-D numerical simulation of overflow on overtopped cofferdams is very deficient because of the wide flow range and the complex boundary.The turbulent model was applied for the complementation between physical model test and numerical simulation.The overflows on the upper and lower cofferdams,the foundation pit,and the riverway were numerically simulated.The spillway capacity of the overtopped cofferdams was calculated under the typical flood conditions.The characteristics of aerate...