旋流式竖井涡室结构优化试验研究  

Test and study on volute chamber structural optimization of cyclone shaft

作　　者：高鹏[1] 杨永全[1] 马耀 王海云[1] 

机构地区：[1]四川大学水电学院,四川成都610065 [2]中国水电顾问集团成都勘测设计院,四川成都610072

出　　处：《人民长江》2006年第11期121-123,128,共4页Yangtze River

基　　金：国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金资助项目(50539060);国家杰出青年科学基金资助项目(50325928)

摘　　要：前人研究结果和具体工程的试验表明，旋流式竖井的涡室结构可能存在过流时涡室空腔较小、偏心严重，且流态较差等问题。为解决这些问题，结合具体工程，通过理论分析和试验研究，给出涡室半径r1与竖井半径R、涡室半径r2与r1的定量关系，涡室圆弧半径宜为竖井半径的1．5～1．6倍，r2宜为r1的0．58～0．625倍；重新定义跌坎为导流坎，其与引水道边墙的夹角以0°～10°为宜。通过水工模型试验验证，本简化方案结构简单，能有效改善涡室内流态，减小工程量，对类似工程设计有重要的参考价值。Existing research results at home and abroad show that there appear some unfavorable hydraulic phenomena in volute chamber of cyclone shafts,such as unsteady flow pattern,serious eccentricity and smaller cavity.In order to solve these problems,theoretical analyses and model tests were conducted on the basis of the volute chamber configuration for a specified project.A modified volute chamber configuration was put forward,with the radii,r_1 and r_2 of volute chamber depending upon the radius R of the vertical shaft: r_1=(1.5～1.6)R,r_2=(0.58～0.625)r_1,and with the angle θ between the diversion sill and the diversion channel side wall changing from 0° to 10°.The model test results show that the cyclone vertical shaft with the modified volute chamber configuration is a good one for simpler structure,lower project quantity and smoother flow pattern in the volute chamber.

关 键 词：旋流式竖井 涡室 流态 试验研究 

分 类 号：TV653[水利工程—水利水电工程]