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在为下个世纪的商用运输机研制新的发动机时,美国通用电气飞机发动机集团(GEAE)打算使燃油效率较现有大型发动机至少提高10％。GEAE在设计GE90超高涵道比涡扇发动机时采取了一种三管齐下的技术策略,即:为充分发挥超高涵道比涡扇发动机的优点,采用了复合材料风扇叶片;为充分发挥总压比高给发动机性能带来的优点,采用了总压比达到23:1的压气机;为了实施低污染排放的环境保护要求,选用了双环腔燃烧室,另外还利用低压比风扇降低噪声。
When developing a new engine for a commercial transport aircraft for the next century, the GEAE intends to increase fuel efficiency by at least 10% over existing large engines. GEAE in the design GE90 ultra-high bypass ratio turbofan engine adopts a three-pronged technical strategy, namely: In order to give full play to the advantages of ultra-high bypass turbofan engine, the composite fan blades; to give full play to the total pressure ratio High engine performance advantages, the use of a total pressure ratio of 23: 1 compressor; In order to implement low-emission environmental protection requirements, the use of dual-ring chamber, in addition to the use of low-pressure ratio fan to reduce noise.