Compute pump head from suction and discharge geometry.
根据吸水管路与压水管路几何高差、管路损失计算水泵所需总扬程。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Pump head | H = (p2 - p1)/(rho · g) + (v2^2 - v1^2)/(2g) + (z2 - z1) + h_f | Bernoulli equation; ISO 9906:2012, Rotodynamic pumps - Hydraulic performance acceptance tests |
| Pump efficiency | eta = hydraulic power / shaft power = rho · g · Q · H / P | ISO 9906:2012, Rotodynamic pumps - Hydraulic performance acceptance tests |
| Shaft power | P = rho · g · Q · H / eta | ISO 9906:2012, Rotodynamic pumps - Hydraulic performance acceptance tests |
| Net positive suction head | Available NPSH must exceed the required NPSH to avoid cavitation | ISO 9906:2012, Rotodynamic pumps - Hydraulic performance acceptance tests |