Wednesday, October 12, 2016

7:36:00 AM

Water hammer causes and effects

Water hammer (or, more generally, fluid hammer) is a pressure surge or wave caused when a fluid (usually a liquid but sometimes also a gas) in motion is forced to stop or change direction suddenly (momentum change). A water hammer commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe. It is also called hydraulic shock. This pressure wave can cause major problems, from noise and vibration to pipe collapse. It is possible to reduce the effects of the water hammer pulses with accumulators, expansion tanks, surge tanks, and other features. Rough calculations can be made either using the Zhukovsky (romanised as Joukovsky or Joukowsky) equation,[1] or more accurate ones using the method of characteristics.[2]
Water hammer causes and effects


Water hammer (or, more generally, fluid hammer) is a pressure surge or wave caused when a fluid (usually a liquid but sometimes also a gas) in motion is forced to stop or change direction suddenly (momentum change). A water hammer commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe. It is also called hydraulic shock. This pressure wave can cause major problems, from noise and vibration to pipe collapse. It is possible to reduce the effects of the water hammer pulses with accumulators, expansion tanks, surge tanks, and other features. Rough calculations can be made either using the Zhukovsky (romanised as Joukovsky or Joukowsky) equation,[1] or more accurate ones using the method of characteristics.[2]




Ahmed Shawky

Author : Ahmed Shawky

Mechanical engineer aspires to make easier Mechanical Engineering and seeking to share experiences

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