1. What is an Air Pressure to Velocity Calculator?

Definition: This calculator converts dynamic pressure (q) to velocity using air density, based on Bernoulli's principle for incompressible flow.

Purpose: It helps aerodynamics engineers, HVAC specialists, and fluid dynamics researchers determine flow velocity from pressure measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Velocity (meters/second)
• \( q \) — Dynamic pressure (Pascals)
• \( \rho \) — Air density (kg/m³)

Explanation: The dynamic pressure is divided by air density, multiplied by 2, and then square rooted to obtain flow velocity.

3. Importance of Pressure-Velocity Conversion

Details: Accurate velocity calculations are essential for aerodynamic testing, ventilation system design, and wind tunnel experiments.

4. Using the Calculator

Tips: Enter the dynamic pressure in Pascals and air density (default 1.225 kg/m³ for standard sea level conditions). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is dynamic pressure (q)?
A: Dynamic pressure is the kinetic energy per unit volume of a fluid particle, measured in Pascals (Pa).

Q2: What's standard air density?
A: At sea level and 15°C, air density is approximately 1.225 kg/m³, but decreases with altitude and increases with humidity.

Q3: When is this formula valid?
A: For incompressible flow (Mach number < 0.3) and assuming no energy losses.

Q4: How do I measure dynamic pressure?
A: Using a pitot tube that measures the difference between total and static pressure.

Q5: What about compressible flow?
A: For compressible flow (higher velocities), more complex equations accounting for Mach number are needed.