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An aerodynamic model for insect flapping wings in forward flight.

Jong-Seob Han1, Jo Won Chang, Jae-Hung Han

  • 1Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, Republic of Korea.

Bioinspiration & Biomimetics
|April 1, 2017
PubMed
Summary

This study presents a new aerodynamic model for flapping wings in forward flight. The model accurately predicts forces and moments, aiding in the design of flapping-wing micro air vehicles.

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Area of Science:

  • Aerodynamics
  • Bio-inspired engineering
  • Fluid mechanics

Background:

  • Flapping flight is complex, requiring accurate aerodynamic models for analysis and design.
  • Existing models often lack sufficient accuracy across various flight conditions.

Purpose of the Study:

  • To develop a semi-empirical quasi-steady aerodynamic model for flapping wings in forward flight.
  • To improve the prediction of aerodynamic forces and moments for flapping wing systems.

Main Methods:

  • Examined 147 cases varying advance ratios and angles of attack.
  • Employed the Polhamus leading-edge suction analogy and power functions.
  • Rebuilt correction factors (K P and K V) as functions of advance ratio (J) and angle of attack (α).

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Main Results:

  • Model estimations closely matched direct force/moment measurements from hawkmoth wingbeats.
  • The model effectively compensated for advance ratio influences, especially in moment estimation.
  • Identified optimal strategies for lift generation and analyzed thrust/moment contributions during wingstrokes.

Conclusions:

  • The proposed model enhances understanding of flapping wing flight dynamics, stability, and control.
  • It provides a valuable tool for designing flapping-wing micro air vehicles.
  • Lowering the angle of attack during downstroke is effective for forward flight lift generation.