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 | \(lbm\;/\;ft^3\) | - |
