The RPM (Revolutions Per Minute) of an engine is not a mass flow rate but a measure of rotational speed. It indicates how many complete revolutions the engine’s crankshaft makes in one minute. To calculate the mass flow rate of air or any fluid through an engine, you typically need other parameters, such as the engine’s displacement volume, air density, and velocity.
- m is the mass flow rate (in kilograms per second, kg/s).
- Rho is the air density (in kilograms per cubic meter, kg/m³).
- A is the cross-sectional area (in square meters, m²) through which the air flows.
- V is the velocity of the air (in meters per second, m/s).