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Cavitation bubbles collapse characteristics behind a convex body
  • ISSN号:1001-6058
  • 期刊名称:Journal of Hydrodynamics
  • 时间:2013.12
  • 页码:886-894
  • 分类:TU761.11[建筑科学—建筑技术科学] X505[环境科学与工程—环境工程]
  • 作者机构:[1]College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China, [2]Hydraulic Structures design division, Hydrochina Huadong Engineering Corporation, Hangzhou 310014, China
  • 相关基金:supported by the National Natural Science Foundation of China(Grant No.51179114)
  • 相关项目:掺气减蚀机理的实验研究
中文摘要:

With the rapid development of high dam projects within China, the dragon-drop-tail spillway tunnel is introduced and widely used. In view of the high water head and the large flow velocity on the dragon-drop-tail section, aerator devices are usually placed for the cavitation damage control. For the device placed in its initial position, it is a serious concern to design a suitable flow regime of the cavity and to control the cavity filling water due to the large flow depth and the low Froude number through this aerator. In this study, the relationships between the geometries of the aerator device and the jet impact angle of the lower trajectory of the flow are theoretically analyzed with/without a local slope. Nine test cases with different geometries are designed, the effectiveness of the filling water control is experimentally investigated under different operation conditions, and two criteria of the local slope design are proposed. It is concluded that the cavity flow regime and the filling water can be improved if a small impact angle and some suitable geometries of the local slope are designed.

英文摘要:

With the rapid development of high dam projects within China, the dragon-drop-tail spillway tunnel is introduced and widely used. In view of the high water head and the large flow velocity on the dragon-drop-tail section, aerator devices are usually placed for the cavitation damage control. For the device placed in its initial position, it is a serious concern to design a suitable flow regime of the cavity and to control the cavity filling water due to the large flow depth and the low Froude number through this aerator. In this study, the relationships between the geometries of the aerator device and the jet impact angle of the lower trajectory of the flow are theoretically analyzed with/without a local slope. Nine test cases with different geometries are designed, the effectiveness of the filling water control is experimentally investigated under different operation conditions, and two criteria of the local slope design are proposed. It is concluded that the cavity flow regime and the filling water can be improved if a small impact angle and some suitable geometries of the local slope are designed.

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期刊信息
  • 《水动力学研究与进展:英文版》
  • 中国科技核心期刊
  • 主管单位:中国船舶重工集团公司
  • 主办单位:中国船舶科学研究中心
  • 主编:矣有生
  • 地址:上海高雄路185号
  • 邮编:200011
  • 邮箱:jhdzhou@aliyun.com
  • 电话:021-63150072
  • 国际标准刊号:ISSN:1001-6058
  • 国内统一刊号:ISSN:31-1563/T
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:427