免费流量计算器
根据流速和截面积计算体积流量。
体积流量
0.01571 m^3/s
Volumetric Flow Rate vs Pipe Inner Diameter
公式
## Volumetric & Mass Flow Rate Flow rate through a pipe depends on the cross-sectional area and the average fluid velocity. ### Formulas **Q = A V = (pi D^2 / 4) V** (volumetric flow) **m_dot = rho Q = rho A V** (mass flow) where D is the pipe diameter, V is the average velocity, and rho is the fluid density.
计算示例
Water flowing at 2 m/s through a 100 mm diameter pipe.
- 01D = 100 mm = 0.1 m
- 02A = pi x 0.1^2 / 4 = 0.007854 m^2
- 03Q = 0.007854 x 2 = 0.01571 m^3/s = 15.71 L/s
- 04Mass flow = 1000 x 0.01571 = 15.71 kg/s
常见问题
What is the typical pipe flow velocity for water?
For water supply systems, design velocities are typically 1-3 m/s. Higher velocities increase friction losses and noise. Lower velocities may allow sediment to settle.
How do I convert between flow rate units?
1 m^3/s = 1000 L/s = 15,850 US gpm = 35.31 ft^3/s. For quick estimates, 1 L/s is roughly 15.85 US gallons per minute.
Does flow rate change along a pipe?
For incompressible fluids in a closed pipe system with no branches, volumetric flow rate is constant along the pipe (continuity equation). If the pipe diameter changes, velocity adjusts to maintain Q = A V.
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