Water Hammer Flow Velocity

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Water Hammer Flow Velocity Formula

\(\large{ v =   \frac{ \left( p_{inc} \;-\; p_i  \right) \; t }{  0.070 \; l  }  }\)   

Where:

 Units English Metric
\(\large{ v }\) = flow velocity \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ p_i }\) = inlet pressure \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ p_{inc} }\) = pressure increase \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ l }\) = upstream pipe length \(\large{ft}\) \(\large{m}\)
\(\large{ t }\) = valve closing time \(\large{sec}\) \(\large{s}\)

 

P D Logo 1

Tags: Water Hammer Equations