The cross-sectional area (A) in a scramjet engine is an important parameter, and it can be calculated using the following formula:
- A is the cross-sectional area in square meters (m²).
- ṁ is the mass flow rate of air in kilograms per second (kg/s).
- V is the velocity of the air entering the engine in meters per second (m/s).
- ρ is the density of the air in kilograms per cubic meter (kg/m³).