侧风干扰对涵道本体的气动特性研究

Aerodynamic Characteristics of Culvert Body Affected by Crosswind Disturbance

针对侧风干扰对涵道风扇稳定性影响,基于Fluent软件对涵道风扇飞行器在前飞状态下受侧风干扰的数值模拟。不仅对涵道飞行器本体在有干扰状态下的气动分析,还分析了不同结构布局的抗侧风能力,并选取了涵道长径比h/d、涵道锥角b、桨盘位置j及桨间间隙四个主要结构布局参数进行了数值计算与分析。结果表明:受到侧风干扰时,涵道飞行器的稳定性和机动性下降,可以通过改变涵道的布局结构来提高涵道飞行器的抗干扰能力,提高涵道风扇飞行器的稳定性。

In view of the influence of crosswind disturbance on the stability of culvert fan, the numerical simulation of crosswind disturbance on ducted fan aircraft in forward flight state is carried out based on fluent software. Not only the aerodynamic analysis of the culvert vehicle body in the presence of interference, but also the cross-wind resistance of different configurations is analyzed. Four main structural layout parameters, i.e., culvert aspect ratio h/d, culvert cone angle b, paddle position j and inter-propeller gap,are calculated and analyzed numerically. The results show that the stability and maneuverability of the culvert vehicle decrease when it is disturbed by crosswind. The anti-jamming ability and the stability of the culvert fan vehicle can be improved by changing the layout and structure of the culvert.