反推装置对翼身融合分布式推进系统气动性能影响数值模拟

Numerical simulation on influence of thrust reverser device on aerodynamic performance of blended-wing-body distributed propulsion system

为了研究新型反推装置对翼身融合分布式推进系统气动性能的影响,将机身简化为二维模型,利用数值模拟的手段来研究攻角、反推开度,以及风扇打开或关闭对飞行参数的影响,为翼身融合分布式推进系统的反推装置设计提供初步的意见和建议。结果显示:反推闭合和风扇打开之后该机型的升力系数和俯仰力矩系数都会有较大增加;随着反推开度的增加,升力系数和俯仰力矩系数也随之增加;来流攻角对翼身融合分布式推进系统的气动性能也有较大影响。

In order to study the influence of the new thrust reverser device on the aerodynamic performance of the blended-wing-body distributed propulsion system,the fuselage was simplified into a two-dimensional airfoil,the numerical simulation method was used to study the angle of attack,the openness of the thrust reverser and the effect of the fan on/off on the flight parameters.Some suggestions about the design of the thrust reverser device on the blended-wing-body distributed propulsion system were carried out.The results show that when the thrust reverser and the fan are turned on,the lift coefficient and pitch moment coefficient of the model increase greatly;as the openness of thrust reverser increases,the lift coefficient and the pitching moment coefficient also increase;the attack angle of incoming flow also has a large impact on the aerodynamic performance of the blended-wing-body distributed propulsion system.