水电站引水系统不同水力波动的耦合分析

Coupling effect analysis of different hydraulic fluctuation in water diversion system of hydropower station

以明渠、压力管道和调压室的非恒定流方程为基本方程,以恒定流计算结果为初始条件,结合渠首边界、渠管结合处边界、调压室边界和阀门边界处的连续方程和能量方程,利用特征线法建立了水锤波、调压室波、明渠波等3种水力波动的数值计算模型,并编制了相应的计算程序。通过典型算例计算,分析了3种波的波动规律及其之间的耦合效应,计算结果符合一般规律,从而验证了所建模型及程序的正确性。

With the unsteady flow equations of open channel, pressure pipe and surge chamber as basic equations, and taking results of steady flow analysis as the initial conditions, and combined with the continuity equation and energy equation at the boundaries of the canal head, the conjunctions of canal and pipe, surge chamber and valve, numerical calculation model for 3 hydraulic fluctuations was established by characteristic line method and corresponding calculation program was complied. By a typical calculation case, the fluctuation law and coupling effects of 3 hydraulic fluctuations were analyzed. The calculated results were in accordance with the general law, which proved the correctness of the established model and calculation program.