宽尾墩在溢洪道挑射水流中的优化应用研究  

Timization Application of Wide Tail Pier in Spillway Jet Flow

作　　者：刘卓 赵慧[1] LIU Zhuo;ZHAO Hui(China Water Resources Beifang Investigation,Design and Research Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《海河水利》2023年第8期85-87,97,共4页Haihe Water Resources

摘　　要：溢洪道在应用挑流消能时,挑射水流在空中掺气扩散,导致其直接冲击下游冲坑附近两侧边坡,对工程长期运行的安全极为不利。在溢洪道挑坎两侧边墙加设宽尾墩,基于Flow-3D软件对水流流态、入水范围及流速进行数值模拟优化研究。结果表明,宽尾墩可使溢洪道挑流水舌向内侧横向收缩,有效地将水舌入水范围收窄,避免水流直接冲击两侧边坡,且入水流速基本保持不变,入水范围相对分散,可削弱对挑流冲坑的影响,有利于工程的长期稳定运行,可为其他类似工程的研究设计提供参考。When the jetting dissipation of energy is applied in spillway,the jet flow will be aerated to diffuse into the air around,causing it to directly impact the slopes on both sides near the downstream flushing pit.This is extremely detrimental to the safety of the long term operation of the project.Flaring gate pier is added to the both side walls of the spillway end sill.The flow state,water entry range and flow velocity are simulated numerically and studied by Flow-3D.The results indicate that the wide fail pier can make the spillway jet flow shrink laterally inward,effectively narrowing the water entry range of the water tongue.The direct impacting on the both slopes is prevented successfully.The inflow velocity remains unchanged basically and the inflow range is dispersed relatively,which can weaken the influence of the flushing pit.Thus it is beneficial to the stable operation of spillway in the long term.This measure can be referred for the research and design of other similar projects.

关 键 词：宽尾墩 溢洪道 挑射水流 数值模拟 Flow 3D 

分 类 号：TV131.3[水利工程—水力学及河流动力学]