基于动网格技术的动力伞阵风响应研究

摘要

动力伞是一种特殊的柔性翼飞行器,在遇到阵风尤其是定常阵风时,无法像刚性翼飞行器一样通过副翼舵面的调整来控制飞行姿态,但是可以通过设计翼面的纵向同期运动.达到缓和降风干扰的目的.文章以动力伞纵向模型为研究对象,引入动网格技术,设定了三个不同周期、不同幅度的同期振荡过程,并在F LUENT中实现了整个响应的动态数值仿真.对同期振荡运动时的气动特性进行分析,并研究比较了运动参数对阵风缓和的影响.实验表明:通过合理得设计动力伞翼面的主动运动方式,可以较好地抑制阵风引起的非定常气动干扰.%The powered parachute is a special kind of soft-wing aircraft. In the face of gust, especially the steady gust, it can not adjust the aileron rudder to control flight attitude like rigid-wing aircraft, but can mitigate the gust disturbance by designing the parafoils longitudinal cyclical movement. The paper studied the longitudinal model of the powered parachute, introduced the method of dynamic meshes, and set three cycles of the parafoil movement with different lime and oscillation. Then it dynamicly simulated the entire response in FLUENT, analyzed the aerodynamic characteristics of the cycles movement, and researched the impact on easing gust disturbance with motion parameters. The experiments show that it can effectively ease the unsteady gust interference with reasonable design of the active movement of the parafoil.