The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor.[1]
Jet engines use either EPR or compressor/fan RPM as an indicator of thrust.[2] When EPR is used, the pressures are measured in front of the compressor and behind the turbine.
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. The IEPR is an engine indicator system unique to the Rolls-Royce RB211.
engine, pressure, ratio, engine, pressure, ratio, total, pressure, ratio, across, engine, measured, ratio, total, pressure, exit, propelling, nozzle, divided, total, pressure, entry, compressor, engines, either, compressor, indicator, thrust, when, used, press. The engine pressure ratio EPR is the total pressure ratio across a jet engine measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor 1 Jet engines use either EPR or compressor fan RPM as an indicator of thrust 2 When EPR is used the pressures are measured in front of the compressor and behind the turbine Contents 1 Integrated engine pressure ratio 2 See also 3 References 4 External linksIntegrated engine pressure ratio EditThe 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 The IEPR is an engine indicator system unique to the Rolls Royce RB211 See also EditJet engine performance TurbofanReferences Edit Glenn Research Center NASA Pressure variation EPR Retrieved January 2 2015 Engine Pressure Ratio EPR code7700 com Archived from the original on 2014 10 04 The Boeing Company Engine thrust control system US Patent 4248042 Includes Boeing s discussion on EPR or IEPR being a better indicator of thrust External links EditPressure Variation EPR NASA Animation This aviation related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Engine pressure ratio amp oldid 1077940368, wikipedia, wiki, book, books, library,
