Total Discharge Head

on . Posted in Fluid Dynamics

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

\(\large{ h_d  =  h_{sd} + h_{pd} + h_{fd}   }\)     (Total Discharge Head)

\(\large{ h_{sd}  =  h_{d} - h_{pd} - h_{fd}   }\)

\(\large{ h_{pd}  =  h_{d} - h_{sd} - h_{fd}   }\)

\(\large{ h_{fd}  =  h_{d} - h_{sd} - h_{pd}   }\)

 Symbol English Metric
\(\large{ h_d }\) = total discharge head \(\large{ft}\) \(\large{m}\)
\(\large{ h_{fd} }\) = friction discharge head \(\large{ft}\) \(\large{m}\)
\(\large{ h_{sd} }\) = static discharge head \(\large{ft}\) \(\large{m}\)
\(\large{ h_{pd} }\) = surface discharge pressure \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)


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Tags: Head