中心出水环高对圆中环沉沙排沙池流速分布影响研究  

Research on the Effect of Velocity Distribution by Heightening Central Outflow Ring in the Circular Rings Desilting and Sediment Ejection Basin

作　　者：张军[1] 侍克斌[1] 高亚平[2] 王进[2] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《中国农村水利水电》2014年第10期113-115,119,共4页China Rural Water and Hydropower

基　　金：新疆自然科学基金项目(2014211B001);新疆科技支撑计划项目(201233132);教育部高等学校博士点专项科研基金资助项目(20106504110005)

摘　　要：针对新型二级沙水分离设施-圆中环沉沙排沙池，采用模型试验方法测试其清水流速环向分布。研究表明：“圆中环”中心出水环不加高工况整体流速环向呈现不均匀分布，135°～225°范围流速较大。“圆中环”中心出水环加高9cm工况整体流速分布较均匀，但中心出水环过高，造成上游进水渠水位升高并增加工程量及投资。试验证明：“圆中环”中心出水环适当加高可提高沉沙效率，设计过程中，中心出水环加高后顶高程不宜超过溢流堰顶高程。The model test method is applied to simulate the velocity in the ring direction of circular rings desilting and sediment ejection basin which is a new water and sediment separation device .The research shows that the distribution of velocity is non-uniform in the ring direction of “circular rings”by not heightening the central outflow ring .Distribution of velocity is larger in the range of 135°- 225° of “circular rings” .The more uniform distribution of velocity by 9cm heightening of central outflow rings in the “circular rings” ,but the phenomenon of the higher of upriver water level and increasing quantities and investment exists by heightening central outflow ring too much .The experiment shows that the high desilting efficiency obtained by properly heightening central outflow rings .In engineering design ,the heightening of central outflow ring top elevation should not exceed the top elevation of overflow weirs .

关 键 词：圆中环沉沙排沙池 中心出水环 流速分布 

分 类 号：TV673[水利工程—水利水电工程]