1. What is Nozzle Exit Velocity?

Definition: This calculator determines the exit velocity of fluid from a nozzle based on pressure drop and fluid density.

Purpose: It helps engineers and technicians in fluid dynamics, HVAC, and mechanical systems to analyze nozzle performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Exit velocity (feet per second)
• \( \Delta P \) — Pressure drop (pounds per square inch)
• \( \rho \) — Fluid density (pounds per cubic foot)

Explanation: The formula calculates the velocity at which fluid exits a nozzle by converting pressure energy to kinetic energy.

3. Importance of Exit Velocity Calculation

Details: Proper velocity calculation ensures efficient system design, prevents cavitation, and helps in selecting appropriate nozzle sizes.

4. Using the Calculator

Tips: Enter the pressure drop in psi and fluid density in lb/ft³ (default 62.4 for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 144 in the formula?
A: This converts psi to psf (pounds per square foot) since 1 psi = 144 psf.

Q2: What's a typical density for water?
A: Water at standard conditions is about 62.4 lb/ft³, but this varies with temperature.

Q3: Does this account for friction losses?
A: No, this is the theoretical maximum velocity. Actual velocity may be lower due to friction and other losses.

Q4: What units does this calculator use?
A: The calculator uses US customary units (psi, lb/ft³, ft/s).

Q5: Can I use this for gases?
A: This formula works best for incompressible fluids. For gases, more complex compressible flow equations are needed.