改进型深筒式消力井过流能力的水力计算

为研究改进型深筒式消力井的过流能力,通过理论分析得到了影响改进型深筒式消力井流量系数的主要因素:多喷孔出水口的孔数、相对孔径比、距径比以及溢流堰相对高度。运用模型试验的方法探讨了各因素与流量之间的定量关系,通过测量试验相关数据,建立了改进型深筒式消力井流量系数和流量的计算公式,将不同相对开孔面积和不同相对溢流堰高度的流量系数实测值与计算值进行对比,结果表明二者吻合情况较好。因此,建立的改进型深筒式消力井的流量系数计算公式可以用来计算消力井工程的过流能力,能为改进型深筒式消力井开孔面积及溢流堰高度的设计提供依据。

Hydraulic calculation on discharge capacity of modified vertical stilling well

In order to study discharge capacity of the modified vertical stilling well，the main factors impacting the discharge coefficient，i. e. the pore number of multi-nozzle outlet，the relative aperture ratio，the distance-diameter ratio and the relative height of overflow weir，are obtained herein through the relevant theoretical analysis. The quantitative relationship among all the factors and the discharge is discussed with the method of model experiment concerned，while the calculation formula for the discharge coefficient and the discharge is established through the relevant measured experimental data，and then the measured values of the discharge coefficients of different relative opening areas and different relative heights of overflow weir are compared with those from the calculations concerned; from which the result shows that both of them are better coincided. Therefore，the established calculation formula for the discharge coefficient of the modified vertical stilling well can be applied to the calculation of the discharge capacity of stilling well project，thus can provide a basis for the designs of both the opening area and the overflow weir height of the modified vertical stilling well as well.