动力伞伞翼阵风响应的数值模拟

采用有限体积法求解非定常Euler方程,并通过引入动态网格方法模拟阵风条件,对不同风速下水平和垂直阵风的伞翼气动力响应进行动态模拟与计算,针对动力伞伞翼柔性结构和飞行速度慢的特点,运用动态仿真方法求解阵风响应的附加气动力与力矩。结果表明:遇水平阵风时,伞翼气动力表现为多周期不同幅度的主动颤振运动;遇垂直阵风时,气动力响应基本与阵风速度变化趋势保持一致,最终稳定后气动力相对于阵风加载前变化不大。

Numerical Simulation of Gust Response for Powered Parachute

The finite volume method is used to solve the unsteady Euler equation.The gust conditions is simulated by using the dynamic mesh method,the horizontal and vertical gust aerodynamic responses under different wind speed are simulated and calculated.Aiming at the characteristics of flexible structure and slow speed for powered parachate,simulation is used to calculate additional aerodynamic force and moment of its non-steady gust response.The results show that in the case of horizontal gust,the parachute does different magnitudes active flutter movement of multiple cycles;in the case of vertical gust,the aerodynamic response basically keeps consistent with wind speed changing trend,it has a little change at the ultimate stability relative to the wind loads.