瀑布沟放空洞掺气设施试验研究  

Aeration Cavitations-Alleviation for Empting Tunnel of Pubugou Hydroelectric Station

作　　者：赵学问[1] 刘善均[1] 田忠[1] 苗宝广[2] 杨伟[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]中南勘测设计研究院水利科学研究所,湖南长沙410014

出　　处：《浙江水利水电专科学校学报》2007年第1期45-48,共4页Journal of Zhejiang Water Conservancy and Hydropower College

摘　　要：瀑布沟水电站是一座正在建设的以发电为主,兼有防洪、拦沙等综合利用效益的大型水电工程.其放空洞流量大,流速高,坡度小,沿程空化数小,存在高速水流空蚀破坏的可能,应采取掺气减蚀措施.通过模型比尺为1∶30的水工模型试验,综合分析前人研究成果和已建工程原型观测资料,结合瀑布沟放空洞的具体情况,对掺气设施进行试验研究.通过试验研究,确定掺气设施位置,提出了瀑布沟放空洞掺气设施采用中闸室闸门后突扩突跌和明流洞中部U形挑坎后接陡坡的掺气形式,为放空洞掺气设施的选型设计提供参考.Pubugou Hydroelectric Station is a mega tectonic hydroelectric project, which will be used to generate electricity, control flood, head off sand and so on, with. massive discharge, high speed flow, mild gradient as the features of its emptying ttmnel. Cavitations are likely to occur, so aeration facility should be built to control cavitations, based on the 1：30 scale model of Pubugou emptying tunnel and combined with the experience of various projects in applying aeration. The paper illustrates how to optimize the position of ventilation vents and how to choose vertical drop and lateral sudden enlargement and air-entraining following abrupt slope by experiments, which is useful for the design of other emptying ttmnels aeration facility.

关 键 词：放空洞 掺气减蚀 模型试验 瀑布沟水电站 

分 类 号：TV131.34[水利工程—水力学及河流动力学]