From design diversion flow and economic velocity, calculate the recommended pipe diameter and estimate friction head loss by Manning, balancing investment and pumping energy.
根据设计流量与经济流速计算管径,并按曼宁公式计算沿程水头损失
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Pipe diameter | D = √(4Q/(π·v)), economic v = 1.0–1.5 m/s | GB 50265 Code for pumping station design; Hydraulics |
| Friction head loss | hf = λ·(L/D)·(v²/2g) (Darcy–Weisbach) | GB 50265; Hydraulics |
引水管道尺寸计算工具用于输水管道管径与水头损失计算。根据设计流量与经济流速计算理论管径,圆整到标准管径后复核实际流速,并采用曼宁公式计算沿程水头损失,加上局部水头损失得到总水头损失,是引水工程管道设计的核心工具。