一种新型掺气型旋流竖井的试验研究  

Experimental study on hydraulic characteristic of the flow in a novel vortex shaft with aeration

作　　者：雷刚[1] 张建民[1] 谢金元[2] 许唯临[1] 陈剑刚[1] 任雨[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,成都610065 [2]中国水电顾问集团成都勘测设计研究院,成都610072

出　　处：《水力发电学报》2011年第5期86-92,100,共8页Journal of Hydroelectric Engineering

基　　金：教育部科学技术研究重点项目(2008108111);国家重点基础研究发展计算(973计划)(2007CB714105);新世纪人才支持计划(NCET-08-0378)

摘　　要：传统旋流竖井泄洪洞在高水头大流量情况运行时,竖井内出现壁面掺气不足,将可能发生空化空蚀破坏影响泄洪建筑物的安全运行。本文提出了一种新型掺气型旋流竖井体型——双涡室掺气型旋流竖井。试验表明:该体型竖井内水流流态更加稳定,掺气更明显,空蚀特性得到明显改善,并增加了消能效果,而且结构更稳定,保证了旋流竖井泄洪洞的泄洪安全。Traditional vortex shaft applied in condition of high head and large discharge,the wall of which can be damaged by resulting in cavitations due to a lack of aeration.In this paper,a novel type of vortex shaft,named as double volute chamber vortex shaft with aeration,was presented.Results showed that there are more stable flow pattern and more obvious aeration phenomenon in new designed geometry.Therefore,cavitations characteristics are improved significantly,and these increase the energy dissipation.Security of the flood discharge structure was ensured due to the stable flow pattern and favorable hydraulic characteristics of the flow in the vortex shaft.

关 键 词：水力学 旋流竖井 双涡室 试验研究 掺气 空化空蚀 水力特性 

分 类 号：TV134[水利工程—水力学及河流动力学]