闸后扩散比对多孔闸门泄流能力影响分析

Analysis on Flow capacity of submerged discharge of multi-opening gate by correlation method

本文利用相关分析方法,对某水闸原型资料进行分析,研究水闸部分孔开启时流量系数的影响因素,提出多孔闸孔口淹没出流时的综合流量系数Cs不仅与相对淹没度(下游堰上水深与闸门开度之比hs/e)有关,同时还与下游水流扩散情况有关,并得出了Cs与相对淹没度hs/e和闸后扩散比b/B(过闸净宽与下游河道宽度之比)的相关关系式Cs=f(hs/e,b/B)。

With the method of correlation analysis, the factors which influence the discharge coefficient of multi-opening gate are studied. The conclusion is obtained that the factors is not only include relative degree of submergence （the ratio of depth of downdraft side to the opening of gate）, but also include the ratio of gate＇s net width to the width of downriver. The correlation formula is obtained.