Water Hammer Maximum Surge Pressure Head

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

 

Water Hammer Maximum Surge Pressure Head Formula

\(\large{  h_{sph}  =  \frac { \alpha \; \Delta v   }   { g  }   }\)     (maximum surge pressure head)

\(\large{  p_{spf}  =  \frac { \alpha \; \Delta v \; \gamma_f  }   { 144\; g  }  }\)     (maximum surge pressure for a fluid)

\(\large{  p_{spw}  =  \frac { \alpha\;  \Delta v   }   { 2.31\;g  }  }\)     (maximum surge pressure for a water)

Symbol English Metric
\(\large{ p_{spf} }\) = maximum surge pressure for fluid \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ p_{spw} }\) = maximum surge pressure for water \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ h_{sph} }\) = maximum surge pressure head \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ \Delta v }\) = fluid velocity change \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ g }\) = gravitational acceleration \(\large{\frac{ft}{sec^2}}\) \(\large{\frac{m}{s^2}}\)
\(\large{ \alpha }\)  (Greek symbol alpha) = pressure wave velocity \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{  \gamma_f } \)  (Greek symbol gamma) = unit weight of fluid \(\large{\frac{lbm}{ft^3}}\) \(\large{\frac{N}{m^3}}\)

 

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Tags: Pressure Equations Water Hammer Equations