考虑连接管的调压室水头损失系数回归分析

为研究调压室结构参数与流态工况对局部水头损失系数的影响，在物理模型实测数据的基础上建立多元线性回归模型。得到了用于计算带连接管的尾水调压室水头损失系数的回归方程，并将回归分析结果与水工模型试验结果进行比较分析。研究表明：回归分析结果与水工模型试验结果吻合度高，相应回归方程能够在分流比、管径比及水流流态的交互作用下较好地反映出局部水头损失系数的变化规律，具有很强的工程适用性，可应用于调压室水力设计中水头损失系数的取值计算。

Regression analysis of head loss coefficient of the surge tank with a connecting pipe

In order to study the influence of structural parameters and flow conditions of surge tanks on the local head loss coefficient, a multivariate linear regression model was established based on the measured data of physical models. The regression equations for calculating the head loss coefficient of the tailrace surge tank with a connecting pipe were obtained, then the results of the equations were compared and analyzed with those of the hydraulic model test. The research shows that the regression analysis results are in good agreement with those of the hydraulic model test, and the corresponding regression equations can well reflect the changeable rule of local head loss coefficient under the interaction of diversion ratio, pipe diameter ratio and flow pattern. So these equations have strong engineering applicability and can be applied to the calculation of head loss coefficient in the hydraulic design of surge tanks.