摘要
搜集了国内外已建工程龙抬头式泄洪洞的运用情况共２２例，对其中一些工程发生空蚀破坏的原因、条件进行了综合分析。提出可以用泄洪洞作用水头、反弧末端平均流速及反弧段水流空化数等３项水力特性的界限值，作为判别龙抬头式泄洪洞反弧段是否会发生空蚀的水力特性标准。
Twenty two practical engineering examples of existing tunnel spillways collocted from at home and abroad are introduced in this paper. Comprehensive analyses from conditions and causes of the cavitation damage at the concave reach for some destructed engineerings among them are performed. Three hydraulic characteristic limit values of the head, velocity and cavitation index at the bucket of tunnel spillway are provided, which are used as discriminating standard of cavitation standard.
出处
《长江科学院院报》
EI
CSCD
北大核心
1998年第2期49-53,共5页
Journal of Changjiang River Scientific Research Institute
关键词
泄洪洞
反弧段
作用水头
流速
水流空化数
空蚀
tunnel spillway
concave reach
acting head
velocity
cavitation index
cavitation damage
