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The General Electric GE90 is a family of high-bypass turbofan aircraft engines built by GE Aerospace for the Boeing 777, ... Bypass ratio [6] 8.4 - 9 9 Pressure ratio ...
The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. [1] A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for every 1 kg of air passing through the core.
As the 129.5 in (329 cm) GE90 fan left little room to improve the bypass ratio, GE looked for additional efficiency by upping the overall pressure ratio from 40 to 60, focusing on boosting the high-pressure core's ratio from 19:1 to 27:1 by using 11 compressor stages instead of 9 or 10, and a third-generation, twin-annular pre-swirl (TAPS ...
Thrust-to-weight ratio: 5.197 ... General Electric GE90 – High-bypass turbofan aircraft engine; Pratt & Whitney PW4000 – High-bypass turbofan aircraft engine;
GEnx on 747-8I prototype. As of 2016, the GEnx and the Rolls-Royce Trent 1000 were selected by Boeing following a run-off between the three big engine manufacturers. The GEnx uses some technology from the GE90 turbofan, [1] including swept composite fan blades and the 10-stage high-pressure compressor (HPC) featured in earlier variants of the engine.
The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. [13] A bypass ratio of 6, for example, means that 6 times more air passes through the bypass duct than the amount that passes through the combustion chamber.
Increasing overall pressure ratio on jet engines tends to decrease SFC. ... GE GE90-94B: turbofan: 777-200/200ER/300 0.2974 [9] 8.42 12100 118700 RR Trent 970-84:
It reached a 40% market share, [5] ahead of the competing PW4000 and GE90, and the last Trent 800-powered 777 was delivered in 2010. [6] The Trent 800 has the Trent family three shaft architecture, with a 280 cm (110 in) fan. [7] With a 6.4:1 bypass ratio and an overall pressure ratio reaching 40.7:1, it generates up to 413.4 kN (92,900 lbf) of ...