为了研究十字形降落伞-子弹药系统的气动特性,对降落伞-模拟子弹药系统进行了数值模拟。分别建立降落伞及模拟子弹药的流体力学数值模型,结合动力学方程,给定初始速度,采用变时间步长,设置速度每变化一定值为一个求解点,得到伞衣打开时间以及伞-弹系统从不同高度抛撒后的稳定落速、阻力特征和所经历的时间等。结果表明,十字形降落伞-模拟子弹药系统在不同高度下拋撒达到稳定落速时的阻力特征及所经历的时间基本相同。

In order to research aerodynamic characteristics of cross-shaped parachute-sub bomb system, parachute-simulated sub bomb system was numerically simulated. Fluid mechanics numerical models of parachute and simulated sub bomb were respectively established. Kinetic equations were united, initial velocity was given, vary time steps were adopted, and solved spot of fixed changing velocity was set up. Opening time of cross-shaped parachute and steady velocity, drag character and down time of parachute-simulated sub bomb system shot from different height were achieved. The result indicates that drag character and down time of cross-shaped parachute-simulated sub bomb system achieving at steady velocity from different height is essentially the same.