1. What is the Fuel Flow Rate Formula?

Definition: This calculator converts fuel mass flow rate (lb/hr) to volumetric flow rate (gallons per minute) using fuel density.

Purpose: It helps engineers and technicians in fuel system design, engine performance analysis, and fuel consumption measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Volumetric flow rate (gallons per minute)
• \( W \) — Mass flow rate (pounds per hour)
• \( \rho_f \) — Fuel density (pounds per gallon)
• 60 — Conversion factor (minutes to hours)

Explanation: The mass flow rate is divided by fuel density to get gallons per hour, then divided by 60 to convert to gallons per minute.

3. Importance of Fuel Flow Rate Calculation

Details: Accurate fuel flow measurement is critical for engine performance optimization, fuel system design, and consumption monitoring.

4. Using the Calculator

Tips: Enter the mass flow rate in lb/hr and fuel density in lb/gal (default 6.8 for diesel). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical fuel density value?
A: Diesel is about 6.8-7.1 lb/gal, gasoline about 6.0-6.3 lb/gal, and jet fuel about 6.5-6.8 lb/gal.

Q2: Why convert mass flow to volumetric flow?
A: Many fuel systems measure flow volumetrically (GPM), while fuel consumption is often calculated by mass.

Q3: How accurate is this calculation?
A: It's theoretically accurate but assumes constant density. For precise measurements, consider temperature effects on density.

Q4: Where would I find mass flow rate data?
A: From engine specifications, fuel consumption tests, or by multiplying volumetric flow by density.

Q5: Can I use this for other liquids?
A: Yes, for any liquid where you know the mass flow rate and density.