缓底坡、低Fr明渠掺气设施水力特性试验  

Experimental Study of an Aerator on the Open Tunnel of Slight Slope and Low Fr

作　　者：夏鹏飞[1] 刘文[2] 刘孝轩 胡俊 XIA Pengfei;LIU Wen;LIU Xiaoxuan;HU Jun(Yangling Vocational and Technical College,Yangling 712100,China;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;Zhejiang Jinyun Pumped Storage Power Co.,Ltd.,State Grid Xinyuan Company,Lishui 321400,China;Hunan Hydro and Power Design Institute,Changsha 410007,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]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 [3]国网新源浙江缙云抽水蓄能有限公司,浙江丽水321400 [4]湖南省水利水电勘测设计研究总院,湖南长沙410007

出　　处：《人民黄河》2019年第11期102-105,共4页Yellow River

基　　金：杨凌职业技术学院2016年自然科学基金项目(A2016015)

摘　　要：针对传统的低弗劳德数、缓底坡明渠遇高水头大流量水流时存在空化空蚀的风险,提出一种布置于有压进口处的新型楔形掺气减蚀设施。通过模型试验,对该楔形掺气设施后的空腔形态、掺气浓度进行了测量。结果表明,采用这种新的掺气设施可以产生稳定的掺气空腔,明渠水体掺气效果明显,并能较快发展至底板,从而对明渠起到掺气保护作用。When the traditional open tunnel of slight slope and low Fr on the conditions of high head and large flow,there is the risk of cavitati on occurred on the surface of open tunnel.So this article described a new type of wedge aerator placed at the pressuring entrance.Hydraulic model tests were used in the study focusing on analysis of hydraulic characteristics including cavity length and air concentration of this new wedge aerator.The results show that the stable cavity can be generated faster,the air entrainment effect is obvious,and the high concentration aerated water uniformly distributes near entire wall of the open tunnel,which is helpful to prevent the open tunnel from cavitation damage.

关 键 词：楔形掺气设施 水力特性 掺气减蚀 试验研究 

分 类 号：TV133[水利工程—水力学及河流动力学]