The pressure ratio (PR) in a turbofan engine is a critical parameter that characterizes the compressor’s performance. It represents the ratio of the air pressure at the compressor outlet to the air pressure at the compressor inlet. Here’s the formula, definition, and SI unit for pressure ratio in aircraft design:
Formula: Pressure Ratio (PR) is calculated using the following formula:
- PR is the 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).