竖井旋流泄洪洞消力井深度对竖井消能率影响的数值模拟研究

Numerical Simulation of the Impact of Stilling Wells' Depth in Vortex Spillway Tunnel on Energy Dissipation Ratio

在竖井旋流泄洪洞中,下挖消力井深度对竖井消能率有较大影响,但在工程中关于消力井合理设计深度的参考资料比较少。运用数值模拟方法,对竖井旋流泄洪洞不同竖井高度和消力井深度竖井消能率进行研究,可为消力井的合理应用提供依据。研究结果表明:应用消力井会使竖井的消能率增加,当竖井高度为50 m^110 m时,随消力井深度增大,竖井消能率变化趋势为先增大后减小;当竖井高度大于120 m时,消力井对竖井消能率影响较小,竖井消能率只有较小增加。

When using vortex spillway tunnel as the way of energy dissipation ,the depths of the stilling wells could have great influence on the energy dissipation ratio .However there are few researches dealing with this issue .Here ,the nu-merical simulation was applied to find out the energy dissipation ratio regarding to different depths of the stilling wells , which could provide valuable information for practical application of the wells .The results indicate that the application of stilling wells will increase the energy dissipation ratio .When the depth is 50m to 110m ,the energy dissipation ratio first increases and then decreases with the increasing of the depth ,however when the depth exceeds 120 m ,it has little im-pact on the energy dissipation ratio ,which only shows a small increase .