水电能源科学

近年来，强降雨引发超标准洪水导致流域安全风险问题日益凸显。针对超标准极端洪水下泄洪闸泄洪能力不足问题，采用Rhino耦合FLUENT三维数值模拟方法，对某防护堤开展瞬间引溃数值模拟研究，分析溃口周围流场的水流特性。结果表明，模型可较好地实现瞬间引溃模拟，8、12孔瞬溃方案泄洪能力满足要求，1、4孔瞬溃后上游水位分别达到59.43、59.37 m,略高于设计水位59.15 m;由于溃堤后水流瞬时下泻，溃口底部流速最大，顶部流速最小。研究结果对开展溃堤问题分析和完善工程调度运用方案具有一定的借鉴意义。

In recent years, the safety risk of river basin caused by heavy rainfall has become increasingly prominent. Aiming at the problem of insufficient discharge capacity of a flood sluice under ultra-standard extreme flood, Rhino coupled FLUENT three-dimensional numerical simulation method was used to carry out numerical simulation of instantaneous collapse of a protective levee, and analyze the flow characteristics of the flow field around the collapse. The results show that the model can well simulate the instantaneous drainage, and the flood discharge capacity of the 8-hole and 12-hole instantaneous drainage schemes meets the requirements. The upstream water level after the 1-hole and 4-hole instantaneous drainage reaches 59.43 m and 59.37 m respectively, slightly higher than the design water level of 59.15 m. The flow velocity at the bottom of the dam break is the largest, while the flow velocity at the top is the smallest. The research results can be used for reference to analyze dam break problem and improve project scheduling scheme.