十字型阻力伞充气过程的数值模拟  

Numerical Simulation on Inflation Process of Cruciform Drag Parachute

作　　者：连红博 喻东明 周昊 赵颖涛[1] Lian Hongbo;Yu Dongming;Zhou Hao;Zhao Yingtao(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;AVIC Aerospace Life-Support Industries,Ltd.,Xiangyang 441003,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]航空工业航宇救生装备有限公司,湖北襄阳441003

出　　处：《航空兵器》2021年第6期83-87,共5页Aero Weaponry

基　　金：航空科学基金项目(20172972002)。

摘　　要：为研究十字型阻力伞的开伞特性,利用ALE(Arbitrary Lagrange-Euler)流-固耦合算法,对十字型阻力伞的充气过程进行了数值模拟研究。本文讨论了计算域尺寸与网格密度对计算结果的影响,并在此基础上详细分析了伞衣的外形变化及开伞动载情况。结果显示,不同开伞速度下,最大动载的模拟结果与实验相吻合,误差均在5%以内,验证了模拟方法的可行性与准确性;伞衣充气时首先由伞臂展开,之后气流在伞衣顶部聚集,待伞顶被完全撑开后,开始逐渐向外扩展,直至伞衣完全张满;阻力伞的开伞动载受伞衣外形变化影响显著,且当伞衣完全张满时,阻力伞达到最大开伞动载。In order to study the opening characteristics of the cruciform drag parachute,the ALE(Arbitrary Lagrange-Euler)fluid-solid coupling method is used to numerically simulate the inflation process of the cross drag parachute.The influence of the calculation domain size and grid densities on the calculation results is discussed,and on this basis,the shape changes of the canopy and the dynamic loading of the parachute are analyzed in detail.The results show that the simulation results of the maximum dynamic load at different opening speeds are consistent with the experiment,the error is within 5%.This can verify the feasibility and accuracy of the simulation method.When the canopy is inflated,the arms are firstly deployed,and then the airflow gathers on the top of the canopy.After being fully extended,it begins to gradually expand outwards until the canopy is completely full.The dynamic load of the drag parachute is significantly affected by the change in the shape of the canopy,and when the canopy is fully opened,the drag parachute reaches the maximum dynamic load.

关 键 词：阻力伞 流-固耦合 数值模拟 充气过程 流场模型 开伞动载 

分 类 号：TJ760[兵器科学与技术—武器系统与运用工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]