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对于现代高涵道比发动机来说,风扇是最关键的部件之一,它能提供80％的推力。风扇的转速要求达到3000～4000转/分,通过风扇的空气流量可达到10000千克/秒,因此风扇的设计要十分仔细。其中风扇叶片不但要求气动性能好而且重量轻和抗外物撞击。 据称,罗-罗公司的风扇叶片有很高的可靠性,无论是普通的还是宽弦的风扇叶片在使用中从未发生过损坏。例如,RB211的普通风扇叶片的无损伤记录超过4000万小时,RB211、泰和V250O发动机的宽弦风扇叶片则超过1000万小时,这在航空发动机制造业实属罕见。预计这种大型空心宽弦风扇叶片,在遄达700和遄达800发动机上也能保持很好的记录。
For modern high bypass ratio engines, the fan is one of the most critical components, it can provide 80% of the thrust. Fan speed requirements of 3000 ~ 4000 rev / min, through the fan air flow up to 10000 kg / s, so the fan design must be very carefully. Fan blades which not only require good aerodynamic performance and light weight and foreign objects impact. Allegedly, Luo - Luo’s fan blades have high reliability, whether it is normal or wide-chord fan blades in use has never been damaged. For example, RB211 ordinary fan blades without damage record more than 40 million hours, RB211, Thailand and V250O engine wide-chord fan blades more than 10 million hours, which in the aero-engine manufacturing industry is rare. This large, hollow, broad-chord fan blade is expected to maintain a good record on the Trent 700 and Trent 800 engines.