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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
Corresponding AuthorJianmin Zhang
2018
Source PublicationWATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
ISSN1606-9749
Volume18Issue:3Pages:790-798
SubtypeArticle
Contribution Rank1
AbstractThe 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.
Keyworddischarge tunnel numerical model physical experiments radial gate opening sudden fall-expansion aerator
DOI10.2166/ws.2017.155
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000437347600005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23411
Collection山地灾害与地表过程重点实验室
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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