1. What is Fuel Mass Flow Rate?

Definition: This calculator determines the mass flow rate of fuel based on volumetric flow rate and fuel density.

Purpose: It helps engineers and technicians calculate fuel consumption in pounds per hour, which is crucial for engine performance analysis and fuel system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The volumetric flow rate is converted to mass flow rate using fuel density, then scaled to pounds per hour.

3. Importance of Fuel Mass Flow Rate

Details: Accurate fuel flow measurement is essential for engine tuning, fuel efficiency calculations, and compliance with emissions regulations.

4. Using the Calculator

Tips: Enter the fuel flow rate in GPM and fuel density (default 6.1 lb/gal for gasoline). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply by 60 in the formula?
A: The factor 60 converts the flow rate from per-minute to per-hour basis (60 minutes in an hour).

Q2: What's a typical fuel density value?
A: Gasoline is about 6.1 lb/gal, diesel about 7.1 lb/gal, and jet fuel about 6.7 lb/gal at standard conditions.

Q3: How do I measure fuel flow rate?
A: Use a flow meter designed for fuel applications, or calculate from engine specifications and fuel consumption data.

Q4: Does temperature affect the calculation?
A: Yes, fuel density changes with temperature. Use density values appropriate for your operating conditions.

Q5: Can I use this for other liquids?
A: Yes, this formula works for any liquid when you know its density in lb/gal.