Aerodynamic analysis of hummingbird-like hovering flight
Aerodynamic analysis of hummingbird-like hovering flight
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DOI：
10.1088/1748-3190/ac28eb
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发表时间：
2021-11-01
影响因子：
3.4
通讯作者：
Shams, Taimur Ali
中科院分区：
文献类型：
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作者：
Haider, Naeem;Shahzad, Aamer;Shams, Taimur Ali
微型扑翼飞行器以其灵活性、机动性和可在受限环境中使用等优点，成为固定翼和旋翼微型飞行器的替代品。蜂鸟的可持续悬停能力激发了许多研究人员开发具有类似动力学的微型飞行器。在这项研究中，一个红喉蜂鸟的翅膀被建模为昆虫翅膀使用膜和加强筋。本文采用流固耦合方法，在雷诺数为3000的条件下，数值研究了柔性对机翼悬停气动性能的影响。通过使用不同的加强筋位置和厚度，开发了不同的机翼。在这项工作中建模的所有机翼的弦向和展向弯曲刚度是类似的跨度和弦长的昆虫。当加劲肋的位置变化时，性能最好的机翼的平均升力系数为0.51。当选取合适的加劲肋厚度时，平均升力系数可提高到0.56。最好的柔性机翼优于刚性机翼，产生的升力和动力经济性可与真实的蜂鸟的翅膀相媲美。也就是说，最佳柔性机翼的平均升力系数和动力经济性分别为0.56和0.88，而蜂鸟机翼的平均升力系数和动力经济性分别为0.61和1.07。研究结果表明，基于合理的加强筋位置和厚度，设计出的柔性机翼结构具有良好的可制造性，可作为仿生扑翼微型飞行器的潜在候选结构。
Flapping wing micro aerial vehicles are studied as the substitute for fixed and rotary wing micro aerial vehicles because of the advantages such as agility, maneuverability, and employability in confined environments. Hummingbird's sustainable hovering capability inspires many researchers to develop micro aerial vehicles with similar dynamics. In this research, a wing of a ruby-throated hummingbird is modeled as an insect wing using membrane and stiffeners. The effect of flexibility on the aerodynamic performance of a wing in hovering flight has been studied numerically by using a fluid-structure interaction scheme at a Reynolds number of 3000. Different wings have been developed by using different positions and thicknesses of the stiffeners. The chordwise and spanwise flexural stiffnesses of all the wings modeled in this work are comparable to insects of similar span and chord length. When the position of the stiffener is varied, the best-performing wing has an average lift coefficient of 0.51. Subsequently, the average lift coefficient is increased to 0.56 when the appropriate thickness of the stiffeners is chosen. The best flexible wing outperforms its rigid counterpart and produces lift and power economy comparable to a real hummingbird's wing. That is, the average lift coefficient and power economy of 0.56 and 0.88 for the best flexible wing as compared to 0.61 and 1.07 for the hummingbird's wing. It can be concluded that a simple manufacturable flexible wing design based on appropriate positioning and thickness of stiffeners can serve as a potential candidate for bio-inspired flapping-wing micro aerial vehicles.