动力系统布置对于翼身融合飞机气动特性的影响

In order to investigate the joint influence of the fan and the core on the aerodynamic characteristics of the cruise, this paper takes a 350-seat blended-wing-body aircraft as the object of study, using the method of first changing the spanwise position of the core and, on this basis, later changing the chordwise and spanwise positions of the power system. The study results show that: Under cruise conditions, the core position has little influence on the pressure distribution on the fairing surface and the aerodynamic characteristics of the aircraft; under cruise conditions, the lift-to-drag ratio can reach 22.39 when the power system swept back angle is −12° and the chord position is 0.8; under the condition that the power system area and flow rate remain unchanged, reducing its spread width will lead to a reduction in lift, drag, lift-to-drag ratio and an increase in the lifting moment. The aircraft reaches a maximum lift-to-drag ratio of 22.39 at a cruise angle of attack of 3.2° and a lift coefficient of 1.054 1 at a take-off angle of attack of 10°, which meets the take-off lift coefficient requirement.