The formula for engine bleed air typically involves multiple variables and depends on the specific aircraft engine and system configuration. However, a simplified formula for calculating engine bleed air flow rate can be expressed as:
Where:
- Engine Mass Flow Rate: The mass flow rate of air entering the engine, typically measured in pounds per hour (lb/hr) or kilograms per hour (kg/hr).
- Bleed Air Extraction Fraction: The fraction of the engine’s mass flow rate that is diverted for bleed air purposes.