泵站空管启动充水过渡过程的波追踪计算方法

Wave Tracking Method for the Filling Process of the Pumping Station

为分析泵站空管启动充水过程的机组工作特性、开阀规律和管路中的压力变化过程,基于波追踪法和界面追踪法建立了泵站空管启动充水过渡过程的刚性模型和弹性模型。某泵站输水系统空管启动充水过程的计算和实验结果表明,两种模型计算得到的泵站短空管启动充水的水力过渡过程与实验结果一致;水泵在阀门开启的过程中流量急剧增大,扬程快速减小,功率增大,在达到极值后随着充水过程的完成,水泵性能参数稳定在工作点。工作阀门后的压强水头为初生波和反射波共同作用的结果。

To investigate the transient working characteristics of the pump,the opening valve law and the pressure change in the pipeline in the filling process of the pumping station,the rigid column model and elastic column model of the hydraulic transient of the filling process are established based on the wave tracking method and the interface tracking method.The calculated and experimental results of the filling process of a pumping station show that the hydraulic transient of the filling process in the short pipe calculated by the two models is consistent with the experimental results.In the process of valve opening,the flow rate of the pump increases sharply,the head decreases rapidly and the power increases.After reaching the extreme value,with the completion of the filling process,the pump parameters are stable at the working point.The pressure head after the valve is the result of a combined effect of primary and reflected waves.