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