Abstract: This paper introduces an experimental research and calculates the results of the analyses of two sorts of culvert shape behind the navigation lock valve (top expansion, sudden expansion). It compares two sorts of the flow state, the drag coefficient in valve, the lowest pressure and the decrease of pressure, the cavitation resistance characleristic at the bottom of the valve, etc. It also analyses the reasons why they are different. At the end of this paper, it recommends the instantly-expanded gallery which can keep valve cavitation off for the reference of the designers concerned.

Key words: culvert shape, drag coefficient, decrease of pressure, cavitation

摘要： 本文介绍了船闸阀门后两种廊道体型(顶扩、突扩)的试验研究及分析成果,比较了两种廊道体型的水流形态,阀门段阻力系数,阀门后廊道顶部最低压力及压降情况,阀门底缘抗空化特性等,分析了两者差别之原因所在,文末推荐的的船闸阀门防空化的突扩廊道体型,供有关人员参考。

关键词: 廊道体型, 阻力系数, 压降, 空化