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Updated: Jun 12, 2025

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对模型的研究,以估计从醒来起飞的滑翔鸟的飞行性能
Jialei Song, Changyao Chen1, Jorn A Cheney2
1School of Mechanical Engineering, Dongguan University of Technology, Dongguan, Guangdong, China.
概括
由于粘性效应,隐形模型可能无法准确预测鸟类飞行空气动力学. 一个基于动量的阻力模型和一个更正的Kutta-Joukowski升降模型显示了对鸟类空气动力学的希望.
科学领域:
- 空气动力学 在空气动力学.
- 生物力学 生物力学
- 流体动力学 流体动力学
背景情况:
- 隐形流量模型在飞机空气动力学中很常见,但在飞行中可能不准确.
- 鸟类飞行涉及较低的雷诺兹数和显著的粘性效应,挑战现有的模型.
- 在不透明模型中像薄翅膀这样的假设可能不适用于鸟类.
研究的目的:
- 评估现有的空气动力学模型对鸟类飞行的适用性.
- 为了将计算流体动力学 (CFD) 预测与飞机飞行的直接力计算进行比较.
- 为了确定鸟类飞行空气动力学准确的升力和阻力模型.
主要方法:
- 计算流体动力学 (CFD) 模拟了滑翔飞行中的高保真体几何.
- 从模拟的清醒与直接的表面力计算进行预测的比较.
- 评估两个升降模型和两个阻力模型,包括Kutta-Joukowski模型和动量保存.
主要成果:
- 一般化的Kutta-Joukowski升降模型,通过流向速度进行校正,准确地预测了升降和跨度负载.
- 基于流体动量保存的阻力模型提供了最好的阻力预测.
- 使用粒子跟踪速度测量 (PTV) 唤醒数据,估计了三种猛禽物种的力量产生.
结论:
- 由于粘性效应和不同的机身/机翼几何形状,现有的无粘性模型需要在飞行时谨慎使用.
- 基于动量的阻力和纠正的Kutta-Joukowski升降模型为鸟类空气动力学性能提供了更好的准确性.
- 该研究为估计鸟类飞行中的空气动力学力提供了一个框架,使用实验和计算方法.
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