The velocity of a propeller-driven engine in aircraft design represents the speed at which air enters the propeller. It’s a fundamental parameter in engine performance analysis. The formula to calculate the velocity of the air entering the propeller (V_prop) is as follows:
- V = Velocity of the air entering the propeller (in meters per second, m/s)
- ṁ = Mass flow rate of the propeller-driven engine (in kilograms per second, kg/s)
- ρ = Density of the air ingested by the engine (in kilograms per cubic meter, kg/m³)
- A = Cross-sectional area of the propeller (in square meters, m²)