Unsteady aerodynamic and optimal kinematic analysis of a micro flapping wing rotor
Unsteady aerodynamic and optimal kinematic analysis of a micro flapping wing rotor
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微型扑翼旋翼非定常气动及优化运动学分析
DOI：
10.1016/j.ast.2016.12.025
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发表时间：
2017-04-01
影响因子：
5.6
通讯作者：
Wu, J. H.
中科院分区：
文献类型：
--
作者：
Li, H.;Guo, S.;Wu, J. H.
受旋转翼和昆虫扑翼能够垂直起降和悬停（VTOLH）的高性能的启发，结合上述两种机翼运动，开发了一种新型扑翼旋翼（FWR）。 FWR 为具有如此高飞行性能的微型飞行器 (MAV) 提供了替代配置。与具有规定机翼运动的旋转翼和类昆虫扑翼的经过充分研究的空气动力学不同，与最佳运动学相关的 FWR 的空气动力升力和效率之前尚未以系统的方式进行研究。因此，本研究的重点是 FWR 在气动升力和效率方面的最佳运动学运动。对展弦比为 3.6、翼展为 200 mm 的 FWR 模型在一系列运动学参数下进行了气动分析。该分析基于具有经验系数的准定常气动模型，并通过 Re 类似于 3500 时的 CFD 结果进行验证。出于比较目的，分析包括悬停状态下的旋转和昆虫扑翼，FWR 在推力等于阻力时处于平衡转速。结果表明，旋翼机的功率效率最大，但升力系数最小。而 FWR 可以产生最大的气动升力，功率效率介于旋转翼和昆虫扑翼之间。研究结果为三种高性能微型飞行器的设计选择以及根据飞行性能要求的最佳运动学提供了量化指导。(C) 2016 Elsevier Masson SAS。版权所有。
Inspired by the high performance of rotary and insect flapping wings capable of vertical take-off and landing and hovering (VTOLH), a novel flapping wing rotor (FWR) has been developed by combining the above two types of wing motions. The FWR offers an alternative configuration for micro air vehicles (MAV) of such high flight performance. Unlike the well-studied aerodynamics of rotary and insect-like flapping wing with prescribed wing motion, the aerodynamic lift and efficiency of the FWR associated with optimal kinematics of motion has not been studied in a systematic manner before. This investigation is therefore focused on the FWR optimal kinematic motion in terms of aerodynamic lift and efficiency. Aerodynamic analysis is conducted for a FWR model of aspect ratio 3.6 and wing span 200 mm in a range of kinematic parameters. The analysis is based on a quasi-steady aerodynamic model with empirical coefficients and validated by CFD results at Re similar to 3500. For comparison purpose, the analysis includes rotary and insect-like flapping wings in hovering status with the FWR at an equilibrium rotation speed when the thrust equals to drag. The results show that the rotary wing has the greatest power efficiency but the smallest lift coefficient. Whereas the FWR can produce the greatest aerodynamic lift with power efficiency between rotary and insect-like flapping wings. The results provide a quantified guidance for design option of the three types of high performance MAVs together with the optimal kinematics of motion according to flight performance requirement.(C) 2016 Elsevier Masson SAS. All rights reserved.