泄洪洞扭曲型挑坎数值模拟应用

为探究验证泄洪消能工扭曲型挑坎的可行性和合理性,以红岩河水库右岸泄洪洞末端扭曲型挑坎为例,采用标准k-ε湍流模型和VOF多相流模型对扭曲型挑坎进行水气两相流三维数值模拟。研究结果表明计算域的整体流态及水面线高程与水工模型试验数据吻合良好,计算误差较小;挑距挑高及冲刷坑深度数据均显示挑坎布置合理,运行安全;下游冲刷趋势与流速紊动能分布均显示消能充分,水流顺利归河。为后期使用数值模拟的研究方法对大交角狭窄河道情况及挑流鼻坎型式的优化设计提供了参考和借鉴。

Numerical Simulation of Spillway Tunnel in Jet Bucket

In order to explore and validate the feasibility and rationality of the flood discharge and energy dissipation pro-ject (contorted jet bucket ) ,this paper took the tunnel contorted jet bucket which located at the end of the reservoir on the right bank of Hongyan River as an example ,the standard k -εturbulent model and VOF multiphase method were ap-plied to simulate the water-air two-phase flow from contorted jet bucket .The results showed that the computed results a-greed well with the hydraulic model experimental data about the flow regime and the elevation of the water line which means the calculation error is small ;The data of horizontal length and high of jet flow and scour depth all show that the jet bucket layout is reasonable and the operation is safe .Downstream scour trend ,the velocity profile and the turbulent kinetic energy distribution indicate that energy dissipation is sufficient and water can flows into rivers smoothly .Further-more it can also provide valuable information for other a large angle narrow channel circumstance and optimization design of flip bucket type .