船闸输水系统流量系数计算方法分析

介绍了葛洲坝1号船闸原型观测资料和模型试验数据,从两方面的实测资料发现“流量系数”接近1.0或大于1.0。分析了产生这一结果的原因。证明“流量系数”大于1.0是成立的,但是这种“流量系数”的数值不能用来评价输水系统的优劣,应该指出,船闸中所指“流量系数”其实质是阀门断面流速系数,最后提出了船闸输水系统真实流量系数的计算方法。

Analysis of the calculation method for discharge coefficient of lock's filling and emptying system

The prototype observation and model test data on the Gezhouba No.1 lock are presented, in which the "discharge coefficients" in the information are approximate to or more than 1.0. The cause generating these results is analyzed. It is proved that the "discharge coefficients" of more than 1.0 is tenable, but these "discharge coefficients" can't be used to assess the good or bad of a kind of lock filling and emptying system. It is also pointed that the "discharge coefficients" here is virtually the velocity coefficient of the culvert valve cross?section. The calculation method for real discharge coefficient of the culvert system is given.