降落伞ー旋转弹系统落速及转速数值模拟

降落伞一旋转弹系统具有复杂的动力学特性，为研究其下落速度与转速的变化过程，在准定常假设下，应用降落伞一旋转弹系统动力学及计算流体动力学对其进行数值模拟。计算中不考虑水平随机风对降落伞一旋转弹系统的影响，不计降落伞、伞绳及旋转弹流场的相互影响，对降落伞及旋转弹流场分别进行数值模拟，所得竖直方向速度及弹的转速随时间变化曲线与空投试验结果相符较好。该方法具有通用性，可应用于一般情况下降落伞一旋转弹系统设计分析及指导降落伞一旋转弹系统投放试验。

Numerical Simulation of Velocity and Spin Speed of Parachute-Spinning Projectile System

The dynamic characteristics of parachute-spinning projectile system is extremely complex. Under quasi-steady hypothesis, the velocity and spin speed of the system were simulated by dynamics and computational fluid dynamics in order to study and control it. The flow fields of the parachute and the spinning projectile were simulated separately without considering the effect of horizontally stochastic wind on the system and the interaction of the flow fields among the parachute, the cords and the spinning projectile. The simulation results are in agreement with the experimental data, which verifies that the accuracy of the numerical simulation model is ensured. The methods used in this paper can also be used in the design of other parachute-projectile systems.