In aircraft design and the analysis of turbofan engines, the actual pressure ratio represents the pressure increase achieved by the compressor under real operating conditions. It quantifies how effectively the compressor is performing in terms of compressing air. Here’s the formula, definition, and SI unit for actual pressure ratio:Formula:
The formula for the actual pressure ratio (PR_actual) is calculated as follows:
- PR_actual is the actual pressure ratio, a dimensionless value.
- P2 is the air pressure at the compressor outlet in Pascals (Pa).
- P1 is the air pressure at the compressor inlet in Pascals (Pa).