<p>Flapping-wing micro-aircraft has broad application prospects in military and civil fields due to their outstanding advantages, but the problem of short endurance caused by low energy utilization rates needs to be urgently solved. In this paper, the dragonfly front wing is utilized as the bionic model to study the influence of morphological characteristics on the aerodynamic performance of wings. Subsequently, a bionic wing with good aerodynamic performance is designed. The geometric parameters of dragonfly wings are measured using various mathematical methods, and the basic size, weight, and area distribution are determined. Through macroscopic and microscopic observation, the basic configuration characteristics of the wing are analyzed, such as plane shape, grid distribution, and airfoil fold structure. The influence of these characteristics on the aerodynamic performance of the bionic wing is explored using computational fluid dynamics methods. The results demonstrate that the plane shape and airfoil fold structures differently affect the aerodynamic performance, but the grid distribution has minimal influence. Based on this, a dragonfly bionic wing is designed and simulated. The simulation results indicate that the average lift coefficient and average drag coefficient of the model in one cycle are both 17.45% higher than those of the prototype wing. Finally, its flapping device with three degrees of freedom and wing aerodynamic test experimental system are established to verify the wing’s aerodynamic performance. The aerodynamic force of the bionic wing is measured in a wind tunnel. This study correlates dragonfly-inspired wing morphology with aerodynamic performance enhancement, exploring its principles, leveraging key three-dimensional morphological features to significantly improve aerodynamic performance, and inspiring the development of high-efficiency bionic wings for micro-flapping-wing aircraft.</p>

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Dragonfly morphology-inspired wing design for enhanced micro-aircraft performance

  • Qiang Liu,
  • Chengyu Zhu,
  • Weiwei Ru,
  • Yanjuan Hu

摘要

Flapping-wing micro-aircraft has broad application prospects in military and civil fields due to their outstanding advantages, but the problem of short endurance caused by low energy utilization rates needs to be urgently solved. In this paper, the dragonfly front wing is utilized as the bionic model to study the influence of morphological characteristics on the aerodynamic performance of wings. Subsequently, a bionic wing with good aerodynamic performance is designed. The geometric parameters of dragonfly wings are measured using various mathematical methods, and the basic size, weight, and area distribution are determined. Through macroscopic and microscopic observation, the basic configuration characteristics of the wing are analyzed, such as plane shape, grid distribution, and airfoil fold structure. The influence of these characteristics on the aerodynamic performance of the bionic wing is explored using computational fluid dynamics methods. The results demonstrate that the plane shape and airfoil fold structures differently affect the aerodynamic performance, but the grid distribution has minimal influence. Based on this, a dragonfly bionic wing is designed and simulated. The simulation results indicate that the average lift coefficient and average drag coefficient of the model in one cycle are both 17.45% higher than those of the prototype wing. Finally, its flapping device with three degrees of freedom and wing aerodynamic test experimental system are established to verify the wing’s aerodynamic performance. The aerodynamic force of the bionic wing is measured in a wind tunnel. This study correlates dragonfly-inspired wing morphology with aerodynamic performance enhancement, exploring its principles, leveraging key three-dimensional morphological features to significantly improve aerodynamic performance, and inspiring the development of high-efficiency bionic wings for micro-flapping-wing aircraft.