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不同大气条件下超声速降落伞系统气动特性分析
Authors
姜璐璐
林明月
+4 more
王奇
荣伟
薛晓鹏
贾贺
Publication date
1 January 2020
Publisher
Abstract
火星探测任务中,超声速降落伞对于火星探测器的减速过程起着至关重要的作用。然而,火星探测器与超声速降落伞系统的数值模拟和风洞试验大多在地球环境中进行,不能完全复现火星用降落伞真实的工作环境,所得气动特性也与真实环境下火星降落伞气动特性存在误差。针对这一问题,文章开展了地球和火星大气环境下超声速降落伞系统的数值模拟研究,并分析不同大气环境、来流条件对降落伞系统气动性能的影响机理,以及不同探测器构型对降落伞系统阻力性能的影响。研究发现:相比于地球大气,在火星大气条件下探测器单体尾流颈部点更加靠近探测器,火星大气环境下伞体阻力略低于地球大气环境;随着截锥数量的增加,器前激波脱体距离、激波角度及颈部点至探测器间距均缩短,阻力系数增加;后截锥导致伞体阻力波动幅度增加,流动周期延长。随着来流马赫数的增大,伞体内压力波动增加,以致流场需要更长时间进入稳定的周期性变化;当来流迎角增大时,伞体内表面压力波动和流场周期性均减弱。此外,三维降落伞模型流场变化模式与二维模型一致,在周期内器前激波角度及脱体距离变化程度更为明显
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Institute Of Mechanics,Chinese Academy of Sciences
See this paper in CORE
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oai:dspace.imech.ac.cn:311007/...
Last time updated on 02/03/2021
Institute Of Mechanics,Chinese Academy of Sciences
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:dspace.imech.ac.cn:311007/...
Last time updated on 19/04/2021