Computational fluid-structure interaction model for parachute inflation
Computational fluid-structure interaction model for parachute inflation
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DOI：
10.2514/3.47008
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发表时间：
1996-07-01
影响因子：
2.2
通讯作者：
Stein, KR
中科院分区：
文献类型：
--
作者：
Benney, RJ;Stein, KR
在降落伞研究中，伞面充气过程是最不了解和最复杂的模型。不幸的是，在打开过程中，座舱盖经常经历最大的变形和载荷。模拟打开过程的复杂性源于座舱盖、伞绳和有效载荷的结构动力学与周围流体介质的空气动力学之间的耦合。增加计算能力来模拟耦合的打开行为将大大有助于理解座舱盖充气过程。本文介绍的研究，涉及耦合计算流体动力学代码的质量弹簧阻尼器降落伞结构代码。轴对称代码耦合显式推进方法。目前的模型和结果的圆形降落伞。数值结果与实验数据的比较将被呈现。这些问题的成功解决，使我们有信心，计算气动弹性问题的降落伞开口可以解决。该解决方案允许将降落伞设计过程从切割和尝试之一移动到基于实验验证的计算工具的一个过程，并减少了对开发期间昂贵且耗时的测试的依赖。
In parachute research, the canopy inflation process is the least understood and the most complex to model. Unfortunately it is during the opening process that the canopy often experiences the largest deformations and loadings. The complexity of modeling the opening process stems from the coupling between the structural dynamics of the canopy, lines, and payload with the aerodynamics of the surrounding fluid medium. The addition of a computational capability to model the coupled opening behavior would greatly assist in the understanding of the canopy inflation process. This article describes research that involves coupling a computational fluid dynamics code to a mass spring damper parachute structural code. The axisymmetric codes are coupled with an explicit marching method. The current model is described and results for a round parachute are presented. A comparison of the numerical results to experimental data will be presented. The successful solution of these problems gives us confidence that the computational aeroelastic problem for parachute openings can be solved. This solution allows moving the parachute design process from one of cut and try to one based on experimentally verified computational tools and reduces the reliance on costly and time-consuming testing during development.