高水头船闸平底廊道反弧形阀门净动水启门力非恒定流试验

Unsteady flow experiment on net hydrodynamic uplifting force of reversed tainter value in flat-bottom galleries of high-head lock

通过非恒定流试验对平底廊道反弧形阀门净动水启门力进行研究,研究表明:1)阀门净动水启门力可以分解为两个部分,一部分由廊道水流作用产生,另一部分由门井水流作用产生;2)各开度下由廊道水流运动引起的阀门净动水启门力与孔口水流弗劳德数的平方成线性变化关系;3)各开度下由门井水流运动引起的阀门净动水启门力与门井水流弗劳德数成线性变化关系;4)首次提出了高水头船闸平底廊道反弧形阀门净动水启门力计算公式,公式计算结果与原型观测结果吻合好,计算精度高。

Net hydrodynamic uplifting force of reversed tainter value in flat-bottom galleries of high-head lock is studied through unsteady flow tests, main result as follows： 1）The net hydrodynamic uplifting force of reversed tainter value is composed of two parts, a part is produced of the corridor current, the other part is produced of the valve shaft current. 2） The net hydrodynamic uplifting force of reversed tainter value resulted from the corridor current has liner relation with square of Froude number of orifice current in every opening. 3） The net hydrodynamic uplifting force of reversed tainter value resulted from the valve shaft current has liner relation with Froude number of valve shaft current in every opening. 4） The formula of net hydrodynamic uplifting force of reversed tainter value in flat-bottom galleries of high-head lock is proposed for the first time, the results calculated is in good agreement with the prototype observation, the proposed formula has a high accuracy.