降落伞主充气阶段的动态仿真及流场分析

Analysis of dynamic simulation and fluid field of parachute in inflation stage

建立了有顶孔的平面圆形降落伞的轴向和径向动量方程,使用数值方法计算出选定的降落伞在主充气过程中各种参数的变化,对降落伞的主充气过程进行了动态仿真.在使用动量方程计算出的的充气模型的基础上,利用降落伞在各个时间结点时的外形和下降速度等相关数据,采用计算流体力学的方法和准定常假设,对降落伞充气过程中的流场进行了模拟和分析,对降落伞充气过程的机理及流场衍变情况进行了探讨.

The axis-radial momentum equations of circular flat parachute were established the changing parameters of a selected parachute were calculated for dynamic simulation of the inflation process. Accoroling to the inflation model calculated by the momentum equa- tion, based on the shape and descent velocity of the parachute at fixed nodes of time, the fluid field was simulated and analyzed according to computational fluid dynamics method under quasi-steady hypothesis. The mechanism of inflation and evolvement of fluid field were analyzed.