Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel

doi:10.2166/ws.2017.155

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel
	Shuai Li1,2 ; Xiaoqing Chen1,2 ; Gordon G. D. Zhou1,2 ; Jiangang Chen1,2
刊名	WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
	2018
卷号	18 期号:3 页码:790-798
关键词	discharge tunnel numerical model physical experiments radial gate opening sudden fall-expansion aerator
ISSN号	1606-9749
DOI	10.2166/ws.2017.155
通讯作者	Jianmin Zhang
产权排序	1
英文摘要	The mechanisms of cavitation damage in flood releasing tunnels remain unclear. In this study a series of physical experiments and numerical calculations were conducted to investigate the flow pattern, pressure distribution and cavitation downstream of a sudden fall-expansion aerator in a discharge tunnel. When the radial gate was partly open, the bottom cavity length reduced drastically, the lateral cavity disappeared, and the flow cavitation index near the sidewalls was less than 0.2. The pressure on the floor and sidewalls can be divided into four regimes: the cavity regime, the impact regime, the reflective regime and the stable regime. The time-average pressure is subject to a unimodal distribution when the gate is fully open, whereas a bimodal distribution is presented when the gate is partly open. The negative pressure regime presented an elliptic shape. Cavitation erosion occurred easily on lateral expansion sidewalls in the tunnel with the radial gate partly open.
语种	英语
WOS记录号	WOS:000437347600005
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23411]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041, China; 3.State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
推荐引用方式 GB/T 7714	Shuai Li,Xiaoqing Chen,Gordon G. D. Zhou,et al. Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel[J]. WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY,2018,18(3):790-798.
APA	Shuai Li,Xiaoqing Chen,Gordon G. D. Zhou,&Jiangang Chen.(2018).Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel.WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY,18(3),790-798.
MLA	Shuai Li,et al."Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel".WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY 18.3(2018):790-798.