Water Hammer Gravitational Acceleration Formula |
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\( g \;=\; \dfrac { \alpha \cdot \Delta v } { h_{sf} } \) (Maximum Surge Pressure Head) \( g \;=\; \dfrac{ \alpha \cdot \Delta v \;\gamma_f }{ 144 \cdot p_{sf} } \) (Maximum Surge Pressure for a Fluid) \( g \;=\; \dfrac{ \alpha \cdot \Delta v}{ 2.31 \cdot p_{sw} } \) (Maximum Surge Pressure for a Water) |
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| Symbol | English | Metric |
| \( g \) = gravitational acceleration | \(ft\;/\;sec^2\) | - |
| \( \Delta v \) = fluid velocity change | \(ft\;/\;sec\) | - |
| \( p_{sf} \) = maximum surge pressure for fluid | \(lbf\;/\;in^2\) | - |
| \( p_{sw} \) = maximum surge pressure for water | \(lbf\;/\;in^2\) | - |
| \( h_{sf} \) = maximum surge pressure head in length of fluid | \(lbf\;/\;in^2\) | - |
| \( \alpha \) (Greek symbol alpha) = pressure wave velocity | \(ft\;/\;sec\) | - |
| \( \gamma_f \) (Greek symbol gamma) = unit weight of fluid | \(lbm\;/\;ft^3\) | - |
