Total discharge head. abbreviated as \(h_d\), also called total head or total dynamic head, is used in fluid mechanics and hydraulic engineering to describe the total energy per unit weight of fluid at any point in a hydraulic system. It represents the sum of different components of head, each contributing to the total energy of the fluid.
Total Discharge Head Formula |
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\( h_d = h_{sd} + h_{pd} + h_{fd} \) (Total Discharge Head) \( h_{sd} = h_{d} - h_{pd} - h_{fd} \) \( h_{pd} = h_{d} - h_{sd} - h_{fd} \) \( h_{fd} = h_{d} - h_{sd} - h_{pd} \) |
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| Symbol | English | Metric |
| \( h_d \) = total discharge head | \(ft\) | \(m\) |
| \( h_{sd} \) = static discharge head | \(ft\) | \(m\) |
| \( h_{pd} \) = surface discharge pressure | \(lbf\;/\;in^2\) | \(Pa\) |
| \( h_{fd} \) = friction discharge head | \(ft\) | \(m\) |
