Integrated Engine Pressure Ratio
- Integrated Engine Pressure Ratio
The Integrated Engine Pressure Ratio (IEPR) is the ratio of the pressure at the core engine exhaust "and" fan discharge pressure compared to the intake pressure to the gas turbine engine.
In some gas turbine engines the engine pressure ratio (EPR) is used, which is the core engine exhaust pressure compared to the intake pressure to the gas turbine engine.
Notes
Integrated Engine Pressure Ratio (IEPR) is an engine indicator system unique to the Rolls-Royce RB211.
ee also
*Turbofan and Gas turbine engine
*Engine Pressure Ratio or (EPR)
References
Source: Rolls Royce "Method for evaluating the working line characteristics of a compressor of a gas turbine engine" [http://www.google.com/patents?vid=USPAT5010727&id=1L4dAAAAEBAJ&dq=5010727/ US Patent 5010727]
Source: The Boeing Company " Engine thrust control system " [http://www.google.com/patents?vid=USPAT4248042&id=bOc1AAAAEBAJ&dq=4248042/ US Patent 4248042] Includes Boeings discussion on EPR or IEPR being a better indicator of thrust.
Source: [http://www.grc.nasa.gov/WWW/K-12/airplane/epr.html Pressure Variation EPR - NASA Animation]
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