Unsteady aerodynamics of a bio-inspired pitching-flapping-perturbed revolving wing with different kinematic frequency combinations

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-09-08 DOI:10.1016/j.ijheatfluidflow.2025.110037

Jiakun Han , Fengjie Zhu , Liya Liu

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引用次数: 0

Abstract

Recently, with the cross-integration of bionic principles in various disciplines, the inception of novel Flapping Rotary Wing (FRW) micro air vehicle that combines both the insect flapping wing and artificial rotary wing has promoted the development of many unmanned flight systems. In fact, the FRW is a self-rotating equilibrium state of a Pitching-Flapping-Perturbed Revolving Wing (PFP-RW), which is limited for understanding the effect of kinematics in coupled motions on its unsteady aerodynamics. In this paper, the insect-like geometry is introduced into the wing modeling, unsteady aerodynamics of a bio-inspired PFP-RW with different kinematic frequency combinations are simulated employing the Immersed Boundary-Lattice Boltzmann Method (IB-LBM) based on the multi-domain grid refinement. Unsteady aerodynamics of the bio-inspired wing and the simplified rectangular wing are compared, and effects of the pitching-flapping frequency differences on aerodynamics of a bio-inspired PFP-RW are discussed. Moreover, the aerodynamic characteristics of the bio-inspired PFP-RW with different flapping frequencies are analyzed. The results show that the aerodynamics of the bio-inspired PFP-RW are closely related to the longitudinal vortex distribution on the airfoil surface. The combination of kinematic frequencies will cause mutual interference between vortex and wing, thereby affecting unsteady aerodynamics of the bio-inspired PFP-RW. Although the pitching-flapping frequency differences will affect the flight stability, it can still be used to obtain higher efficiency in some special maneuvering situations. However, the optimization of flapping frequency needs to be combined with flow field analysis. These results provide quantitative guidance for designing novel high-performance Micro Air Vehicles (MAVs) with optimal kinematics.

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不同运动频率组合下仿生俯仰-扑动-摄动旋转翼的非定常空气动力学

近年来，随着多学科仿生原理的交叉融合，结合昆虫扑翼和人工旋翼的新型扑翼旋翼（FRW）微型飞行器的出现，推动了许多无人飞行系统的发展。事实上，FRW是俯仰-扑动-摄动旋转翼（PFP-RW）的自旋转平衡状态，这限制了对耦合运动中运动学对其非定常空气动力学影响的理解。本文将昆虫类几何结构引入机翼建模中，采用基于多域网格细化的浸入式边界-晶格玻尔兹曼方法（IB-LBM）对仿生PFP-RW不同运动频率组合的非定常空气动力学进行了仿真。比较了仿生翼和简化矩形翼的非定常气动特性，讨论了俯仰-扑动频率差异对仿生PFP-RW气动特性的影响。此外，还分析了不同扑动频率下仿生PFP-RW的气动特性。结果表明，仿生PFP-RW的气动性能与翼型表面的纵向涡分布密切相关。运动频率的组合会造成涡流与机翼之间的相互干扰，从而影响仿生PFP-RW的非定常气动特性。虽然俯仰-扑动频率差会影响飞机的飞行稳定性，但在一些特殊的机动情况下，仍然可以利用俯仰-扑动频率差来获得更高的飞行效率。然而，扑动频率的优化需要与流场分析相结合。研究结果为新型高性能微型飞行器的运动学优化设计提供了定量指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.