The cross-sectional area ((A)) in the context of a GE YF120 or any gas turbine engine generally refers to the area through which air or another working fluid enters the engine.
– A is the cross-sectional area through which the air is flowing (in square meters, m²).
– V is the velocity of the airflow (in meters per second, m/s).
– ṁ is the mass flow rate (in kilograms per second, kg/s).
– ρ is the air density (in kilograms per cubic meter, kg/m³).