三峡地下电站变顶高尾水洞水动力特性  

Hydrodynamic characteristics of changing top-altitude tailrace tunnel for Three Gorges Project's underground power plant

作　　者：薛阿强[1] 罗禹权[2] 王列[1] 严伟[1] 

机构地区：[1]长江科学院水工研究所,湖北武汉430010 [2]长江科学院长江控制设备研究所,湖北武汉430010

出　　处：《长江科学院院报》2001年第4期9-13,共5页Journal of Changjiang River Scientific Research Institute

摘　　要：在国内首次应用模型水轮发电机组对三峡地下电站变顶高尾水洞方案进行水力过渡过程试验研究。对水轮机导叶实行分段关闭 ,并求出了二段关闭的最佳拐点 ,试验证实了二段关闭对减小尾水管进口的负压和机组转速上升有明显的作用。通过有关水力参数的测试 ,认为变顶高尾水洞可以满足各项技术要求 ,是一个减少山体开挖、节省投资的新型设计方案。The test research on hydraulic transient process inside the changing top-altitude tailrace tunnel of TGP's underground power plant was conducted for the first time in our country by use of a model generating set. Adopting the piece wise linear closure for guide vanes of turbine, the best inflection point of two-step closure (i.e. closed in two kinds of uniform speed) was found, and it was verified that the method of two-step closure has obvious effect for decreasing negative pressures and the rising rates of rotational speed of generating set. Through the measurement of hydraulic parameters, it was regarded that the changing top-altitude tailrace tunnel scheme can meet all the technical requirements, and it is a new-type design scheme benificial for decreasing rock excavation and saving engineering investment. It can be widely applied in underground plant.

关 键 词：三峡工程 地下电站 变顶高尾水洞 水击压力 

分 类 号：TV135.1[水利工程—水力学及河流动力学]