变水位条件下某无压水工隧洞的空化空蚀研究  

Research on Non-pressure Hydraulic Tunnel's Cavitation and Cavitation Erosion Under Variable Water Head Conditions

作　　者：罗毅 LUO Yi(Power China Zhongnan Engineering Corporation Limited, Changsha 410014, China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,长沙410014

出　　处：《中国农村水利水电》2019年第4期110-113,119,共5页China Rural Water and Hydropower

摘　　要：空化是常见的水力学现象,空蚀破坏是常见的水力学问题,二者相互关联,严重危害过流建筑物的使用寿命和安全。无压水工隧洞作为重要的输水或泄水建筑物,确保其过流的连续性和安全性至关重要。以某具体输水工程为研究背景,采用物理模型试验和理论计算相结合的方法研究变水位条件下无压水工隧洞的空化和空蚀问题。通过研究,对隧洞的空化空蚀进行了科学的量化判断,并对无压水工隧洞局部边界的施工提出具体工程措施和建议,确保了无压水工隧洞在变水位条件下的输水的安全。Cavitation is a common hydrodynamic phenomenon, and cavitation erosion is also a common problem. The two matters are related to each other, which seriously endangers overflowing structure's life and safety. Non-pressure hydraulic tunnel as very important water conveyance or drainage building, ensuring hydraulic tunnel's continuity and safety is important. In this paper, based on the background of a water supply project, it focuses on studying cavitation and cavitation erosion by the method of physical model test and theoretical calculation. Through the research, it quantitatively decides non-pressure hydraulic tunnel's cavitation problem. Meanwhile, it propounds specific measures and suggestions for non-pressure hydraulic tunnel's boundary conditions. As a result,it ensures safety of water conveyance under variable head conditions.

关 键 词：变水位 无压水工隧洞 空化 空蚀 掺气槽 

分 类 号：TV672[水利工程—水利水电工程]