1. 中国空气动力研究与发展中心,绵阳,621000
2. 国防科技大学 空天科学学院,长沙,410073
高兴龙(1987-),男,吉林蛟河人,副研究员,研究方向:气动设计,多体系统动力学. E-mail:gaoxinglong@cardc.cn
陈钦*(1980-),男,副研究员,研究方向:风洞设计,气动优化. E-mail:qchen2015@hotmail.com
纸质出版:2023
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高兴龙, 陈钦, 张青斌, 等. 翼伞后缘偏转过程的流固耦合动力学特性[J]. 空气动力学学报, 2023, 41(5): 68−75.
GAO Xinglong, CHEN Qin, ZHANG Qingbin, et al. Fluid-structure interaction dynamic characteristics of parafoil under trailing-edge deflection[J]. 2023, 41(5): 68-75.
高兴龙, 陈钦, 张青斌, 等. 翼伞后缘偏转过程的流固耦合动力学特性[J]. 空气动力学学报, 2023, 41(5): 68−75. DOI: 10.7638/kqdlxxb-2021.0397
GAO Xinglong, CHEN Qin, ZHANG Qingbin, et al. Fluid-structure interaction dynamic characteristics of parafoil under trailing-edge deflection[J]. 2023, 41(5): 68-75. DOI: 10.7638/kqdlxxb-2021.0397.
深入研究翼伞后缘偏转过程的气动与结构耦合动力学问题是解决大型翼伞精确空投系统机动转弯和雀降等操纵动作设计分析的重点内容。首先基于ALE算法和罚函数耦合方法对翼伞后缘偏转过程进行流固耦合动力学建模,之后基于结构化的ALE求解方法和瞬态非线性求解器对翼伞三维模型的单个气室后缘偏转进行仿真验证,预测了后缘偏转运动引起的周围流场流动分离现象。分别针对翼伞后缘单侧下偏和双侧下偏过程的流固耦合行为进行仿真分析,获得全时域内翼伞结构场和周围流场特性动态演化结果,以及翼伞气动性能参数时间历程曲线,发现了后缘下偏过程的操纵延迟现象。最后通过风洞试验对仿真结果进行验证,证明了方法的有效性,为大型冲压翼伞的设计和应用提供理论和技术支撑。
A deep understanding of the fluid-structure interaction (FSI) problem of the parafoil under trailing-edge deflection is crucial for the maneuvering and landing design of large parafoils’ precision airdrop system. Based on the ALE (arbitrary Lagrangian Eulerian) algorithm and the penalty coupling method
the FSI modeling of parafoils under trailing-edge deflection is firstly proposed
then the structured ALE (S-ALE) method and the transient nonlinear dynamics solver are used to simulate a single cell 3D model of the parafoil under trailing-edge deflection
and the flow separation phenomenon due to the trailing-edge deflection is captured. The FSI characteristics of the parafoil under both single and double deflections are simulated and analyzed. The structural and surrounding flow fields evolution in the time domain are obtained
as well as the time history profiles of various parafoil aerodynamics. It is found that there is a delay in the manipulation under trailing-edge deflection. Finally
the simulation results are verified by a wind tunnel test
which suggests the efficiency of our method. The present results provide good support for the design and application of large parafoils.
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