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有限质量降落伞充气动力学数值模拟
引用本文:高兴龙,张青斌,高庆玉,唐乾刚,杨涛.有限质量降落伞充气动力学数值模拟[J].国防科技大学学报,2016,38(4):185-190.
作者姓名:高兴龙  张青斌  高庆玉  唐乾刚  杨涛
作者单位:国防科技大学航天科学与工程学院,国防科技大学航天科学与工程学院,国防科技大学航天科学与工程学院,国防科技大学航天科学与工程学院,国防科技大学航天科学与工程学院
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
摘    要:为研究空投任务中降落伞有限质量充气过程的动力学行为,基于罚函数耦合方法和网格自适应技术分析了降落伞柔性结构与周围不可压缩流场的流固耦合特性。数值模拟开伞过程伞衣三维外形变化,获得降落伞系统下落速度、阻力面积等参数;对比分析初始投放速度对降落伞开伞时间、伞衣阻力面积的影响;通过试验数据对比分析开伞力变化。计算结果表明,该方法可以有效模拟降落伞系统有限质量充气过程的动力学特性,仿真结果与试验结果相符。

关 键 词:降落伞  流固耦合  有限质量充气  ALE动网格
收稿时间:2015/11/16 0:00:00

Numerical simulation on finite mass inflation dynamics of parachute
GAO Xinglong,ZHANG Qingbin,GAO Qingyu,TANG Qiangang and YANG Tao.Numerical simulation on finite mass inflation dynamics of parachute[J].Journal of National University of Defense Technology,2016,38(4):185-190.
Authors:GAO Xinglong  ZHANG Qingbin  GAO Qingyu  TANG Qiangang and YANG Tao
Institution:GAO Xinglong;ZHANG Qingbin;GAO Qingyu;TANG Qiangang;YANG Tao;College of Aerospace Science and Engineering,National University of Defense Technology;Facility Design and Instrumentation Institute of China Aerodynamics Research and Development Center;
Abstract:To analyze the supersonic opening performance parachute in Mars entry environment are studied. Based on the Multi-material Arbitrary Lagrange Euler (MMALE) method algorithm, the coupling models between compressible fluid and flexible structure of parachute are solved. The evolution of 3D shape of DGB parachute during supersonic inflation is simulated, and the structural dynamics behaviors of canopy fabric is predicted. The drag area and coefficients are compared with the wind tunnel data. The inflation performance of parachute and the influence of forebody are analyzed. Finally, the wake of unsteady fluid and distribution of shock wave around supersonic parachute are investigated. The results show: The DGB parachute is well inflated without seriously collapse. As the increase of Mach numbers, the drag coefficients gradually decrease, along with the increase of the inflation time, which bring into correspondence with the test results, and prove the validity of the method proposed in this paper.
Keywords:Parachutes  fluid-structure interactions  finite mass  incompressible fluid  opening force
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