Compute friction head loss along a pipe.
采用 Hazen-Williams 公式计算圆管沿程水头损失、压降与管内流速。
请输入参数后计算。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Hazen-Williams formula | h_f = 10.67 · L · Q^1.852 / ( C^1.852 · d^4.87 ) in SI units | Hazen A, Williams GS, Hydraulic Tables (1905), John Wiley |
| Roughness coefficient C | A larger C means a smoother pipe and less head loss | Hazen A, Williams GS, Hydraulic Tables (1905) |
| Range of application | Intended for water at normal temperatures in turbulent pipe flow, not viscous liquids | Hazen A, Williams GS, Hydraulic Tables (1905) |
| Relation to Darcy-Weisbach | The two can be converted; Darcy-Weisbach is more general but needs the friction factor | Crane Co., Flow of Fluids Through Valves, Fittings, and Pipe (TP-410) |