Characteristics of aeration in the flow downstream of a radial gate with a sudden fall-expansion aerator in a discharge tunnel
文献类型：期刊论文
| 作者 | Shuai Li1,2 ; Xiaoqing Chen1,2; Gordon G. D. Zhou1,2; Jiangang Chen1,2
|
| 刊名 | WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
 |
| 出版日期 | 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 |
| 产权排序 | 1 |
| 通讯作者 | Jianmin Zhang |
| 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 |
| 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。