斜向进水矩形消力井井深设计研究  

Depth Design for Rectangular Stilling Well with Oblique Water Intake

作　　者：谢红英 邱勇 周鑫宇 葛亚飞 寸寿健 XIE Hongying;QIU Yong;ZHOU Xinyu;GE Yafei;CUN Shoujian(School of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学水利学院,云南昆明650201

出　　处：《人民珠江》2022年第3期77-81,共5页Pearl River

基　　金：国家级大学生创新创业训练计划项目(201910676044)。

摘　　要：传统底流消能工的地形条件无法满足池长要求时,可通过增大池深和池宽来达到消能目的。为得到矩形消力井在不同来流条件下分别对应的适宜井深,通过水工模型试验,研究井深变化对消力井底板冲击压强的影响以及入射淹没射流弗劳德数和井深的关系。成果表明:井深增加冲击区的冲击压强和脉动压强方差均减小,但其降幅随井深的增大而降低;消力井所需要的适宜井深随入射水流弗劳德数增大而增大。依托试验成果,进一步给出泄槽末端断面入射水流(跃前)水深和消力井适宜深度的拟合公式,可为工程设计提供参考。When the topography conditions cannot satisfy the needs of the length of the stilling pool during traditional bottom-flow energy dissipation, the energy can be dissipated by increasing the depth and width of the pool.To obtain suitable depths for a rectangular stilling well under different inflow conditions, we study the influence of well depth on the impact pressure borne by the bottom plate of the stilling well and the relationship between the Froude number of the incident submerged jet and well depth through hydraulic model tests.The research findings are as follows: The impact pressure and the variance of the fluctuating pressure in the impact zone both decrease as well depth increases, although their decreasing amplitudes gradually reduce;the suitable well depth the stilling well needs increases with the Froude number of the incident water flow.Relying on the test results, we also present a fitting formula for the water depth before the hydraulic jump of the incident water flow at the transect at the end of the discharge chute and the suitable depth for the stilling well.The proposed formula is expected to provide a reference for engineering design.

关 键 词：井深设计 跃前水深 冲击压强 淹没射流 消力井 

分 类 号：TV135[水利工程—水力学及河流动力学]