Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (6): 821-828.DOI: 10.12068/j.issn.1005-3026.2021.06.010

• Mechanical Engineering • Previous Articles     Next Articles

Analysis of Aerodynamic Characteristics of Bionic Flapping Wing Aircraft Based on XFlow

ZHANG Zhi-jun1, CHEN Mo1, YANG He-jie2, SUN Ji-yu3,4   

  1. 1. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China; 2. College of Physics, Jilin University, Changchun 130012, China; 3. School of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China; 4. Key Laboratory of Biomimetic Engineering, Ministry of Education, Jilin University, Changchun 130022, China.
  • Revised:2020-07-20 Accepted:2020-07-20 Published:2021-06-23
  • Contact: SUN Ji-yu
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Abstract: The bionic flapping wing motion is realized by the rapid return characteristic of space crank and rocker structure. In order to explore the influencing factors of the aerodynamic characteristics of bionic flapping aircraft, the particle tracking method of Boltzmann model is adopted to simulate the aerodynamic characteristics during flapping. Based on the computational fluid dynamics simulation software XFlow, a simulation analysis is carried out for different airfoils, wingspan and wing plane shapes and the influence on lift and thrust is explored. The results show that the lift coefficient of the flapping wing aircraft increases with the rise of the airfoil curvature and wingspan, and the thrust coefficient decreases with the increase of the bending degree. Through the comprehensive analysis, it is found that when the wingspan length is 2.5 times the chord length, the aerodynamic characteristics are the best. Wings with different wing surface shapes have different aerodynamic characteristics. Compared with the trailing edge geometry, the leading edge has a greater impact on the aerodynamic characteristics.

Key words: bionic; flapping wing aircraft; XFlow; wing shape; aerodynamic characteristics

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