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普惠公司的PW8000发动机的主要特点是采用齿轮传动风扇的结构,这种结构将使发动机的转子级数和叶片数分别比现有相当推力级的常规发动机的少40%和50%.该发动机的初步设计正在进行中,其详细设计在6月以前开始.因此,PW8000的一些特点将在今夏最后确定,预计合格证将从6月份以后用30个月时间取得.对于一种典型的涡扇发动机而言,其高压涡轮驱动高压压气机,而低压涡轮驱动低压压气机和风扇,然而最有效的风扇转速比低压涡轮的转速低,这导致都不是特别有效的折衷转速.对于齿轮驱动的风扇系统而言,减速
The main feature of Pratt & Whitney PW8000 engine is the use of gear drive fan structure, this structure will make the engine rotor and vane number respectively 40% and 50% less than the conventional equivalent thrust level of conventional engines. The engine The preliminary design is underway and its detailed design will begin before June. As a result, some features of the PW8000 will be finalized this summer and the certificate is expected to be available in 30 months from June. For a typical turbofan In the case of engines, the high-pressure turbine drives the high-pressure compressor, whereas the low-pressure turbine drives the low-pressure compressor and the fan, however, the most efficient fan rotates at a slower speed than the low-pressure turbine, which results in neither being a particularly effective compromise speed. System, slow down