降落伞充气过程流固耦合方法的数值预测分析  

Numerical Prediction Analysis of Parachute Inflation Process Using Fluid-Structure Interaction Method

作　　者：陈猛 王璐 程涵[2] 余莉[2] 

机构地区：[1]航宇救生装备有限公司,襄阳441000 [2]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2013年第4期515-520,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(11172137)资助项目;航空科学基金(20122910001)资助项目

摘　　要：为弥补经验方法的不足,对某五环锥伞进行了无限质量情况降落伞充气过程的流固耦合数值模拟和飞机减速过程开伞试验。应用任意拉格朗日欧拉流固耦合方法数值模拟了折叠降落伞的三维充气过程,将计算结果和有限质量充气情况下的试验结果进行了比较:数值计算所得到的伞衣摆角、充满时投影直径、阻力特征都和试验情况一致。充气时间和开伞载荷受速度影响很大,经速度修正后,充气时间略快于试验结果,最大开伞载荷和试验结果高度一致。以上表明无限质量情况下流固耦合数值模拟能够预测降落伞的充气性能,对降落伞设计和试验具有一定的参考价值。In order to compensate the lack of traditional empirical methods, the inflating process of a five- ring cone parachute in infinite mass condition is simulated based on fluid-structure interaction（FSI） method, and the corresponding aircraft deceleration test is also done. The folded parachute inflating process is simulated by arbitrary Lagrangian Eulerian FSI method. The simulation results are compared with the test results in finite mass condition. It is found that the swinging angle, the projected diameter in fully inflated time and the drag characteristics are consistent with the test results. Moreover, the in- flation time and the opening load are affected by velocity greatly. Based on the revised velocity, the pre- dicted inflation time is slightly faster than that in the test, and the opening load is consistent with that in the test. The above indicate that the numerical method based on FSI can predict the parachute inflating performance.

关 键 词：降落伞 充气过程 流固耦合 数值模拟 试验 

分 类 号：V244.21[航空宇航科学与技术—飞行器设计]