The Overall Pressure Ratio (OPR) in aircraft design is a significant parameter that characterizes the compression process in a gas turbine engine. It is defined as the ratio of the total pressure at the compressor’s exit to the total pressure at the compressor’s inlet.
The formula for calculating the Overall Pressure Ratio is as follows:
- The Total Pressure is the sum of the static pressure and dynamic pressure. It is typically measured in Pascals (Pa) or pounds per square inch (psi), depending on the system of units used.