In a very short time, the sharp rise in pressure in the pipe, can achieve large value

Water hammer is a pressure pipeline systems a common physical phenomena. When the audio channel in the continuity of the liquid caused by the pressure drop transient  Instrument valve manifolds , again followed by pressure recovery, the collapse of the cavitation effect is as if a hard metal hammer hammering the same effect as in a very short period of time , sharp rise in pressure in the pipe, can achieve large value, or even alternately lifting the pressure fluctuation. For example, in the flow direction has a long pipe, leading abruptly closed, the pipeline and water will  High pressure ball valve  forward due to inertia, while the formation of cavitation, then the water has been pushed back and rupture of cavitation. Sometimes accompanied by hammering appear roaring sound and vibration. This is the. Flow velocity in the pipe caused dramatic changes in the internal pressure of the fluid alternately lifting of wave phenomena, namely the so-called hydrodynamic water hammer phenomenon, also known as water hammer phenomenon. Initially, this phenomenon did not cause nuclear power plant designers and researchers' attention.