Knowledge (XXG)

Engine pressure ratio

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to include fan discharge total pressure and compressor inlet total pressure. If compressor inlet pressure is P0 and fan discharge total pressure is P1, then the integrated engine pressure ratio will be P1 /P0.
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Jet engines use either EPR or compressor/fan RPM as an indicator of thrust. When EPR is used, the pressures are measured in front of the compressor and behind the turbine.
182: 575: 742: 565: 28:, 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. 538: 570: 438: 487: 761: 735: 523: 129: 518: 294: 766: 317: 595: 513: 373: 771: 467: 254: 728: 443: 413: 408: 332: 249: 107: 60: 680: 448: 418: 665: 628: 580: 342: 533: 482: 560: 352: 48: 712: 660: 453: 423: 393: 327: 675: 618: 312: 240: 209: 174: 225: 755: 585: 383: 357: 289: 169: 86: 639: 613: 603: 433: 388: 508: 503: 322: 220: 212: 279: 205: 152: 25: 670: 528: 378: 337: 274: 700: 708: 644: 403: 347: 269: 264: 245: 65: 40: 259: 428: 284: 156: 39:
The integrated engine pressure ratio (IEPR) is a ratio used on some
608: 159:'s discussion on EPR or IEPR being a better indicator of thrust. 178: 115: 716: 47:
The IEPR is an engine indicator system unique to the
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Index

jet engine
turbofans
Rolls-Royce RB211
Jet engine performance
Turbofan
"Pressure variation - EPR"
"Engine Pressure Ratio (EPR)"
the original
"integrated engine pressure ratio"
US Patent 4248042
Boeing
Pressure Variation EPR - NASA Animation
v
t
e
Jet engines
aircraft
gas turbines
Gas turbines
jet propulsion
Air turborocket
Pulsejet
Gluhareff Pressure Jet
Pulse detonation engine
Propfan
Turbofan
Turbojet
Turboprop
Turboshaft
Ramjet

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