向家坝水电站底孔封堵门槽与工作门槽抗空化试验研究  

Model test and study of gate groove cavitation for the deep outlets of Xiangjiaba hydropower station

作　　者：严根华[1] 陈发展[1] 郭熙宏[2] 袁长生[2] 胡去劣[1] 

机构地区：[1]南京水利科学研究院,南京210029 [2]中南勘测设计研究院,长沙410014

出　　处：《水力发电学报》2010年第2期47-54,共8页Journal of Hydroelectric Engineering

摘　　要：本文研究向家坝水电站底孔封堵闸门与工作闸门门槽的水力学问题,通过常压和减压模型相结合的方法,首先研究了原设计方案二道门槽的水流空化特性,揭示了封堵闸门和工作闸门门槽出现强空化等存在问题。根据二套门槽不同的空化特点,通过体型系列修改和优化,以及大量对比试验,提出了相应的空化防治体型和措施。减压试验论证结果显示,推荐方案具有良好的抗空化效果。This paper studies the hydraulic and cavitation performances of gate grooves by normal pressure scale-model tests and vacuum tank tests to improve the design of close-off gate grooves and work gate grooves of the Xangjiaba flood-release deep outlets. Test results reveal strong flow cavitation in the two types of grooves designed by the original schemes. Through different modification and optimization for each groove and comparison of many alternative schemes,the cavitation performances of both grooves are significantly improved. Vacuum tank tests verified the anti-cavitation effect of the recommended schemes.

关 键 词：封堵门槽 工作门槽 空化 减压试验 防空化措施 

分 类 号：TV131.32[水利工程—水力学及河流动力学]