Resonance mechanism of flapping wing based on fluid structure interaction simulation

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外文摘要：Certain insect species have been observed to exploit the resonance mechanism of their wings.In order to achieve resonance and optimize aerodynamic performance,the conventional approach is to set the flapping frequency of flexible wings based on the Traditional Structural Modal(TSM)analysis.However,there exists controversy among researchers regarding the relation-ship between frequency and aerodynamic performance.Recognizing that the structural response of wings can be influenced by the surrounding air vibrations,an analysis known as Acoustic Structure Interaction Modal(ASIM)is introduced to calculate the resonant frequency.In this study,Fluid Structure Interaction(FSI)simulations are employed to investigate the aerodynamic performance of flapping wings at modal frequencies derived from both TSM and ASIM analyses.The perfor-mance is evaluated for various mass ratios and frequency ratios,and the findings indicate that the deformation and changes in vortex structure exhibit similarities at mass ratios that yield the highest aerodynamic performance.Notably,the flapping frequency associated with the maximum time-averaged vertical force coefficient at each mass ratio closely aligns with the ASIM frequency,as does the frequency corresponding to maximum efficiency.Thus,the ASIM analysis can provide an effective means for predicting the optimal flapping frequency for flexible wings.Furthermore,it enables the prediction that flexible wings with varying mass ratios will exhibit similar deformation and vortex structure changes.This paper offers a fresh perspective on the ongoing debate concern-ing the resonance mechanism of Flexible Flapping Wings(FFWs)and proposes an effective methodology for predicting their aerodynamic performance.

外文关键词：

Flexible Flapping Wing(FFW)Acoustic Structure Interac-tion Modal(ASIM)Fluid Structure Interaction(FSI)Resonance mechanismAerodynamic performance

作者：

Yueyang GUO、Wenqing YANG、Yuanbo DONG、Dong XUE

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作者单位：

National Key Laboratory of Science and Technology on Aerodynamic Design and Research,School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China

Research & Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518063,China

Yangtze River Delta Research Institute of Northwestern Polytechnical University,Taicang 215400,China

基金：

National Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research Foundation,ChinaBasic Research Program of Shenzhen,ChinaNational Key Laboratory of Science and Technology on Aerodynamic Design and Research,China

项目编号：

522752932023A1515010774JCYJ 2019080614281652461422010301

出版年：

2024

DOI：

10.1016/j.cja.2024.01.011

中国航空学报(英文版)

中国航空学会

中国航空学报(英文版)

CSTPCDEI

影响因子：0.847

ISSN：1000-9361

年,卷(期)：2024.37(5)