体积流量计算器 — 公式
## Volumetric Flow Rate
Volumetric flow rate is the volume of fluid passing through a cross-section per unit time. It is widely used in piping design, pump selection, and flow measurement.
### Formula
**Q = V × A = V × pi × D² / 4**
where V is the average fluid velocity and A is the pipe cross-sectional area. Different industries use different units: m³/h in process, L/min in hydraulics, GPM in plumbing.
Volumetric flow rate is the volume of fluid passing through a cross-section per unit time. It is widely used in piping design, pump selection, and flow measurement.
### Formula
**Q = V × A = V × pi × D² / 4**
where V is the average fluid velocity and A is the pipe cross-sectional area. Different industries use different units: m³/h in process, L/min in hydraulics, GPM in plumbing.
计算示例
Water flowing at 3 m/s through a 150 mm pipe.
- D = 150 mm = 0.15 m
- A = pi × 0.15² / 4 = 0.01767 m²
- Q = 3 × 0.01767 = 0.05301 m³/s
- Q = 0.05301 × 60000 = 3180.9 L/min
- Q = 0.05301 × 15850.3 = 840.2 GPM