This article presents a development of a simple analytical aerodynamic model capable of describing the effect of leading-edge vortices (LEVs) on the lift of rotating samara wings. This analytical model is based on the adaptation of Polhamus’ method to develop a sectional two-dimensional lift function, which was implemented in a numerical blade element model (BEM) of a rotating samara blade. Furthermore, wind tunnel experiments were conducted to validate the numerical BEM and to assess the validity of the newly developed analytical lift function. The results showed good agreement between the numerical model and the experimental measurements of rotational speed and rate of descent of the samara wing. The results were also compared with numerical predictions using BEM but adopting different lift coefficient expressions available in literature. This research contributed towards efficient aerodynamic modelling of the lift generated by LEVs on rotating samara wings for performance prediction, which could potentially be used in the design of bio-inspired rotary micro-air vehicles.

中文翻译：

---

用于预测旋转翼果种子性能的分段前缘涡升模型

本文介绍了一个简单的分析空气动力学模型的发展，该模型能够描述前缘涡流 (LEV) 对旋转翼翅升力的影响。该分析模型基于对 Polhamus 方法的改进，以开发截面二维升力函数，该函数在旋转叶片的数值叶片元模型 (BEM) 中实现。此外，进行风洞实验以验证数值边界元法并评估新开发的分析升力函数的有效性。结果表明，数值模型与翼翼的旋转速度和下降率的实验测量值之间具有良好的一致性。还将结果与使用 BEM 但采用文献中可用的不同升力系数表达式的数值预测进行了比较。