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A Computational Study on Lateral Flight Stability of the cranefly in Hover

Computer Modeling in Engineering & Sciences 2021年第8期128卷 669-685页

作者： Na Xu Shuaizhi Zhou Chunchen Zhang Xiaolei Mou School of Electromechanical and Automotive Engineering Yantai UniversityYantai264005China School of Civil Engineering Yantai UniversityYantai264005China

The dynamic flight stability of hovering insects includes the longitudinal and lateral *** results have shown that for the majority of hovering insects the same longitudinal natural modes are identified and the hovering flight in longitudinal is ***,in lateral,the modal structure for hovering insects could be different and the stability property of lateral disturbance motion is not as robust as that of longitudinal *** cranefly possesses larger aspect ratio and lower Reynolds number,and such differences in morphology and kinematics may make the lateral dynamic stability *** this paper,the lateral flight stability of the cranefly in hover is investigated by numerical ***,the stability derivatives are acquired by solving the incompressible Navier–Stokes ***,the dynamic stability characteristics are checked by analyzing the eigenvalues and eigenvectors of the linearized *** results indicate that the lateral dynamic modal structure of cranefly is different from most other insects,consisting of three natural modes,and the weakly oscillatory mode illustrates the hovering lateral flight is nearly *** neutral stability is mainly caused by the negative derivative of roll-moment ***-velocity,which can be attributed to the weaker‘changingLEV-axial-velocity’*** results suggest that insects in nature may exhibit different dynamic stabilities with different morphological and kinematic parameters,which should be considered in the designs of flapping wing air vehicles.

关键词： Flapping flight cranefly lateral flight stability natural modes of motion computational fluid dynamics

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