Calculating Compressed Air Velocity in Pipe

Velocity Formula:

\[ v = \frac{Q}{A} \]

Velocity (v):

m/s

1. What is Compressed Air Velocity in Pipe?

Definition: This calculator determines the velocity of compressed air flowing through a pipe based on the flow rate and pipe cross-sectional area.

Purpose: It helps engineers and technicians ensure proper air flow velocity for efficient system operation and to prevent issues like excessive pressure drop or noise.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ v = \frac{Q}{A} \]

Where:

\( v \) — Velocity (meters per second, m/s)
\( Q \) — Flow rate (cubic meters per second, m³/s)
\( A \) — Cross-sectional area (square meters, m²)

Explanation: The flow rate is divided by the cross-sectional area of the pipe to determine the linear velocity of the air.

3. Importance of Air Velocity Calculation

Details: Proper velocity calculation ensures:

Efficient compressed air system operation
Minimized pressure drop
Reduced noise levels
Prevention of moisture accumulation
Optimal pipe sizing

4. Using the Calculator

Tips:

Enter the flow rate in m³/s (convert from other units if necessary)
Enter the pipe's cross-sectional area in m²
For circular pipes: \( A = \pi \times r^2 \) where r is the radius
All values must be > 0

5. Frequently Asked Questions (FAQ)

Q1: What is a typical air velocity range for compressed air systems?
A: Recommended velocities are typically between 6-9 m/s for main lines and 9-15 m/s for branch lines.

Q2: How do I calculate cross-sectional area for a circular pipe?
A: Use \( A = \pi \times r^2 \) where r is the radius, or \( A = \pi \times (d/2)^2 \) where d is diameter.

Q3: What happens if velocity is too high?
A: Excessive velocity can cause pressure drop, noise, erosion, and moisture carryover.

Q4: How do I convert flow rate from liters/second to m³/s?
A: Divide by 1000 (1 m³/s = 1000 L/s).

Q5: Does this calculator account for pressure and temperature?
A: No, this is for standard conditions. For different pressures/temperatures, use the ideal gas law to adjust flow rates.