基于自由飞行的生物数据,对复杂的飞运动进行空气动力学分析
Yishi Shen1,2, Yi Xu1,2, Shi Zhang1,2
1Intelligent Robotics Institute, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
Bioinspiration & biomimetics
|January 9, 2025
概括
鸟类的翅膀变形,包括翅膀曲和翅膀折叠,显著影响了空气动力学力和升力产生. 板扭转提供了动态控制,而板扫除的影响最小,指导生物模拟飞机设计.
科学领域:
- 航空航天工程 航空航天工程
- 生物力学 生物力学
- 流体动力学 流体动力学
背景情况:
- 鸟类的翅膀利用复杂的变形机制进行空中机动,这种机动由,曲,折叠,扫动和扭动来描述.
- 这些在不同飞行阶段的合翼运动对空气动力学的影响尚未完全理解,这限制了生物模拟飞机设计.
研究的目的:
- 通过数值研究四种基于飞的合翅膀运动 (飞曲,飞折叠,飞扫除,飞扭转) 对空气动力学性能的影响.
- 在不同的飞行阶段分析这些运动:起飞,水平飞行和降落.
- 为设计具有多度自由度翅膀的生物飞机提供见解.
主要方法:
- 在类似子的气翼模型上利用计算流体动力学 (CFD) 模拟.
- 分析了来自真实飞的翅膀跳动数据,用于四种相结合的运动.
- 检查了对流场的影响,短暂的空气动力学力,以及每个运动所做的工作.
主要成果:
- 曲导致攻击角度的变化,影响前沿 (LEV) 的附着和提升.
- 折叠调节了LEV的附着和的脱离,显著影响了升力产生.
- 片扫描显示,飞行阶段对流场的影响最小.
- 板扭转可以实现动态空气动力学调整,减少起飞时的阻力,并在降落时增加阻力.
结论:
- 结合的翅膀运动显著影响鸟类的空气动力学性能和升力产生.
- 板曲,板折叠和板扭曲提供了不同的空气动力学控制机制.
- 了解这些合运动为开发先进的仿生飞机提供了关键的理论指导.
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