A Hydraulic Transient Study On Classical Pump System In The Project Of Transferring Water From Yellow River In Jiaodong Region

In water supply system works, flow rate suddenly changing in pressure piping that create pressure of stream current steep rise or sudden drop, which is also called water hammer or hydraulic transient. Water hammer shall affect largely the normal operation of pumping station, water hammer pressure of general cut-off water hammer is higher 1.5 to 4 times than normal pressure, and the hammer of water column separation can generate greater water hammer pressure. Many pumping station had been destroyed badly by water hammer and this cause great loss to the normal production and life for people. Therefore, hydraulic transient calculation of long distance and high lift pump of water supply works has becomes one of important project. Only when hydraulic transient of pumping station is precede precision & rational numerical calculation, at the same time adopt requirement safety measure of water hammer, which ensure safe operation of pumping station.The author bring about the model of connecting-pipe calculation between pipes and pipes, calculation model of pipes and open-channel, boundary model of vane running, water-level controlling model, original value of system model, air value model and collateral calculating numerical model. All of models are applied the pump system in the project of transferring water from Yellow River in the Jiaodong region.