垂直曲和空气动力性能在飞行蛇灵感的空中波浪
Yuchen Gong1, Zihao Huang1, Haibo Dong1
1Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22093, United States of America.
Bioinspiration & biomimetics
|November 13, 2024
概括
将垂直曲添加到滑翔蛇模型中,可以显著提高空气动力学性能. 通过特定的垂直波和背部腹部曲幅度实现了最佳的起重和起重-拖拉比率,提高了滑翔效率.
科学领域:
- 空气动力学和流体动力学
- 生物启发的机器人和机动机器人.
- 计算科学与工程 计算科学与工程
背景情况:
- 飞蛇的运动包括复杂的空中波浪.
- 之前的研究主要集中在水平波浪.
- 垂直曲在提高空气动力学性能方面的作用仍未得到充分研究.
研究的目的:
- 通过数值研究垂直曲的蛇形模型的空气动力学特征.
- 在垂直运动的空中波动过程中分析流体动力学和结构.
- 确定垂直波和背腔腹腔曲的最佳参数,以最大限度地提高提升和效率.
主要方法:
- 计算流体动力学 (CFD) 使用不可压缩的流量溶解器.
- 沉浸式边界方法模拟移动的身体.
- 在模型周围进行拓局部网状精细化,以获得高分辨率的网格.
主要成果:
- 垂直曲改变了前沿的 vortex 形成和有效的攻击角度,影响起重.
- 在垂直波幅 (ψm) 为2.5°时观察到峰值提升,在 ψm = 5°时观察到最高的提升-拖拉比率 (L/D).
- 背腹曲 (ψDV) 影响身体与身体的相互作用;在 ψDV = 5°时,提升增加了 17.3%,在 ψDV = -5°时,L/D 达到最佳水平.
结论:
- 垂直曲是提高滑翔蛇形模型空气动力学性能的一个关键因素.
- 垂直波和背腔腹腔曲的特定幅度可以显著提高起重生成和滑翔效率.
- 了解这些流动动态为设计更高效的生物灵感飞行器提供了基本的见解.
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