THE NUMERICAL ANALYSIS OF IMPACT OF CHANGES IN FLIGHT CONDITIONS AND IN ENGINE'S REGIME AT CRUISE ON AIRPLANE'S AERODYNAMIC CHARACTERISTICS

摘要

The results of the work show that for advanced airplanes with high bypass ratio turbofans forces acting on propulsion system elements at cruise depend very strong on flight conditions and engine's regime and the design of propulsion systems for some mean point of typical cruise flight trajectory can lead to gain in airplane's overall fuel efficiency up to 1 %.