细长板开启角度与明渠均匀流流量关系研究

Study on the relationship between opening angle of slim plates and discharge of uniform flow in open channels

分析绕轴转动细长板在一定的明渠均匀流流量作用下的受力状况,应用静力矩平衡原理对细长板的开启角度与明渠均匀流流量的关系进行研究,推导出它们之间的计算关系式.该式表明细长板的开启角度随明渠均匀流流量的增大而增大,两者具有单值对应关系.通过水力试验,将同一流量下细长板开启角度的理论计算值与试验测量值进行比较,结果表明两者吻合良好,为灌区量水提供了一种新方法.

Based on an analysis of the stressing state of a slim plate turning on its axis under the action of uniform flow with certain discharge in an open channel, a study was performed on the relationship between the opening angle of slim plates and the discharge of uniform flow in the open channel, and a corresponding formula for calculation was derived. According to the formula, the opening angle of slim plates increases with the discharge of uniform flow. Hydraulic experiments show that the calculated results of the opening angle of slim plates are in good agreement with the measured data. So the present study provides a new method for discharge measurement in irrigated areas.