In piston engine design for aircraft, the mass flow rate refers to the amount of air-fuel mixture ingested by the engine per unit of time. The formula for mass flow rate (ṁ) can be defined as:
– ṁ is the mass flow rate (in kilograms per second, kg/s).
– ρ is the air density (in kilograms per cubic meter, kg/m³).
– A is the cross-sectional area through which air enters the engine (in square meters, m²).
– V is the velocity of the air entering the engine (in meters per second, m/s).