人们常把发动机形容为飞机的心脏,一架飞机只要有一个强壮的发动机,它一定具有较好的性能,能长期高效完美地完成既定的飞行任务。因此,在飞机的研制中,发动机占据举足轻重的地位。配备一台安全可靠、经济性良好、性能优异的发动机至关重要。高涵道比占据舞台在上世纪五六十年代大飞机所用的发动机是逐渐由涡轮螺旋桨发动机、涡轮喷气发动机向低涵道比涡轮风扇发动机过渡的,且形成三种发动机并存的局面。但是这些发动机推力小、耗油率高,从而导致飞机的载客量小、航程短,以及噪声很大。于是人们开 People often describe the engine as the heart of an airplane. An aircraft with a strong engine must have good performance and be able to perform its intended mission perfectly and efficiently over a long period of time. Therefore, in the development of the aircraft, the engine occupies a pivotal position. Equipped with a safe, economical, excellent performance engine is essential. High-bypass ratio occupies the stage In the 1950s and 1960s large aircraft engine is gradually by the turboprop, turbojet to low bypass ratio turbofan engine transition, and the formation of three co-exist the situation of the engine. However, these engines have low thrust and high fuel consumption, resulting in small passenger loads, short voyages and high noise levels. So people open