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The integrated engine pressure ratio (IEPR) is a ratio used on some turbofans 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. [3]
The Pratt & Whitney TF30 used on the F-111 had a pressure ratio of about 20:1, while newer engines like the General Electric F110 and Pratt & Whitney F135 have improved this to about 30:1. An additional concern is weight. A higher compression ratio implies a heavier engine, which in turn costs fuel to carry around.
Turbofan engines are usually described in terms of BPR, which together with overall pressure ratio, turbine inlet temperature and fan pressure ratio are important design parameters. In addition BPR is quoted for turboprop and unducted fan installations because their high propulsive efficiency gives them the overall efficiency characteristics of ...
The Honeywell HTF7000 is a turbofan engine produced by Honeywell Aerospace. Rated in the 6,540–7,624 lbf ... Overall pressure ratio: 28.2 [15] Bypass ratio: ...
The Pratt & Whitney F100 (company designation JTF22 [1]) is a low bypass afterburning turbofan engine. ... Overall pressure ratio: 32:1; Air mass flow: 248 lb/s ...
The AE 3007 is a direct drive turbofan engine with a single stage fan, ... Overall Pressure ratio: 23:1 [21] Bypass ratio: 5:1 [21] See also. Related development.
The Pratt & Whitney JT3D is an early turbofan aircraft engine derived from the Pratt & Whitney JT3C turbojet. ... Overall pressure ratio: 16:1 overall; Bypass ratio ...
The CF6-80 series are high-bypass turbofan engines with a thrust range of 48,000 to 75,000 lb (214 to 334 kN). ... Overall pressure ratio is 28.0, with a bypass ratio ...