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对不带气室翼伞和带气室翼伞的气动特性和结构变形进行三维数值模拟,分析气室对翼伞气动特性和结构变形的影响.流场方面,采用有限体积法求解Navier-Stokes控制方程,选用剪切应力输运(SST,Shear-Stress Transport)k-ω湍流模型;结构方面,假定翼伞有初始形状,使用插值方法映射传递流固交界面的压力数据,通过ANSYS计算翼伞伞衣的气动变形.结果表明:气室对阻力影响不大,对升力的影响主要表现在大迎角情况下;翼伞柔性和尺寸大小对其有利迎角的范围影响不大;翼伞的气动变形和最大主应力主要集中在气室中前部分,带气室翼伞由于有肋片加强的缘故,伞衣气动变形较小,一定程度上保证了翼伞的气动特性.
The aerodynamic characteristics and structural deformation of airfoil without air chamber wing and air chamber wing umbrella were analyzed by three-dimensional numerical simulation to analyze the influence of air chamber on the aerodynamic characteristics and structural deformation of airfoil. In terms of flow field, finite volume method was used to solve Navier-Stokes In the structural aspect, assuming that the parafoil has an initial shape, the pressure data at the interface of the flow and solidification interface are mapped using the interpolation method and the wing is calculated by ANSYS The results show that the air chamber has little effect on the resistance and the impact on the lift is mainly at the high angle of attack. The flexibility and size of the wing umbrella have little influence on the range of its favorable angle of attack. The aerodynamic deformation and the maximum principal stress are mainly concentrated in the front part of the gas chamber. Due to the strengthening of the ribs with the air chamber wing umbrella, the aerodynamic deformation of the umbrella umbrella is small, which ensures the aerodynamic characteristics of the wing umbrella to a certain extent.