弧形坡道式出水箱涵内部水流流态研究  

Study on the flow Pattern in the Curved Ramp Outlet Tank Culvert

作　　者：奚斌[1] 徐健 张雄伟 王欣昱 陈志刚 沈世煊 陈叶欣 宋梓豪 连延续 吉睿 XI Bin;XU Jian;ZHANG Xiong-wei;WANG Xin-yu;CHEN Zhi-gang;SHEN Shi-xuan;CHEN Ye-xin;SONG Zi-hao;LIAN Yan-xu;JI Rui(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225000,Jiangsu Province,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225000

出　　处：《中国农村水利水电》2025年第3期71-75,85,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51541912);“十二五”国家科技支撑计划项目(2102BOD08B03-2)。

摘　　要：为研究弧形坡道式出水箱涵内部流场流态,探究不良流态的优化方案,采用物理模型试验和数值模拟相结合的方法研究分析其内部水流流态,针对其不良出水流态,在压力箱涵内部设计两种不同的整流方案,并对箱涵内部的特征断面流态、流速及压强分布进行研究比较。研究表明:在原设计方案下,箱涵内部涵道间出现串流、进水前端出现回流等不良流态;同时,涵道内流量分配系数达到最高36.07%,最低只有8.73%,隔墩两侧的压强差最大达到354.90 Pa;采用“隔墩位置+挑流底板坡比优化”组合方案后,箱涵内部串流现象得到消除,箱涵进水前端回流部分消除,涵道流量分配系数最低降至20.23%,最接近理想流量分配;其余隔墩两侧压强差减小到35.15 Pa,整流效果显著,为以后类似泵站流态改善提供参考。In order to study the flow field and flow pattern inside the curved ramp outlet tank culvert and explore the optimization scheme of the undesirable flow pattern,the physical model test and numerical simulation were combined to study and analyze the internal flow pattern.Two different rectification schemes were designed to solve the undesirable flow pattern inside the pressure box culvert,and the flow pattern,velocity and pressure distribution of the characteristic section inside the box culvert were studied and compared.The results show that,under the original design,there are undesirable flow patterns such as flow in the box culvert and backflow at the inlet end.At the same time,the maximum flow distribution ratio in the culvert is 36.07%,the minimum is 8.73%,and the maximum pressure difference between the two sides of the barrier pier is 354.90 Pa.After adopting the combination scheme of“pier position+slope ratio optimization of flow bottom plate”,the flow phenomenon inside the culvert is eliminated,the return part of the inlet water in the box culvert is eliminated,and the flow distribution ratio of the culvert is reduced to 20.23%at the lowest,which is closest to the ideal flow distribution.The pressure difference between the two sides of the remaining piers is reduced to 35.15 Pa,and the rectification effect is remarkable,which provides a reference for the flow improvement of similar pump stations in the future.

关 键 词：弧形坡道式箱涵 隔墩开孔 挑流坡比 整流 数值模拟 

分 类 号：TV675[水利工程—水利水电工程]