한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제49권3호
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  • Pages.185-195
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  • 2021
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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날갯짓 초소형 비행체의 앞전 및 시맥 탄성이 공력 성능에 미치는 영향

Effect of the Leading Edge and Vein Elasticity on Aerodynamic Performance of Flapping-Wing Micro Air Vehicles

  • Yoon, Sang-Hoon (Department of Aerospace Engineering, Seoul National University) ;
  • Cho, Haeseong (Department of Aerospace Engineering, Jeonbuk National University) ;
  • Shin, Sang-Joon (Department of Aerospace Engineering, Seoul National University) ;
  • Huh, Seokhaeng (Unmanned/Intelligent Robotic System R&D, LIG Nex1) ;
  • Koo, Jeehoon (Unmanned/Intelligent Robotic System R&D, LIG Nex1) ;
  • Ryu, Jaekwan (Unmanned/Intelligent Robotic System R&D, LIG Nex1) ;
  • Kim, Chongam (Department of Aerospace Engineering, Seoul National University)
  • 투고 : 2021.01.21
  • 심사 : 2021.02.16
  • 발행 : 2021.03.01
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초록

본 연구의 날갯짓 초소형 비행체는 실제 생명체의 날개를 모방하여, 매우 유연한 재질의 캠버날개를 활용한다. 캠버 날개는 생명체와 유사하게 앞전, 시맥, 박막과 같이 특성이 서로 다른 세가지 재질로 구성되어 있고 다양한 방식으로 구속되어 있다. 날개의 유연성을 활용한 수동 회전(passive rotation) 방식은 앞전과 시맥의 재질이 날갯짓 궤적에 매우 큰 영향을 미치는 요소이기 때문에 적절한 유연성을 갖는 재질의 선정이 필수적이다. 이러한 날개의 재질들과 복잡한 형상을 사실적으로 모델링하여 정밀하게 해석할 수 있는 유체-구조 연성해석 프로그램을 개발하고, 날개의 앞전과 시맥의 탄성 계수의 변화에 따른 공력탄성학 효과를 정밀하게 분석하였다. 결과적으로 재료의 탄성 계수 변화만으로도 날개의 비틀림각 궤적을 적절히 발생시킴으로써 날갯짓 비행체의 추력 및 효율을 크게 증가시킬 수 있음을 보였다.

The flapping-wing micro air vehicle (FW-MAV) in this study utilizes the cambered wings made of quite flexible material. Similar to the flying creatures, the present cambered wing uses three different materials at its leading edge, vein, and membrane. And it is constrained in various conditions. Since passive rotation uses the flexible nature of the wing, it is important to select an appropriate material for a wing. A three-dimensional fluid-structure interaction solver is developed for a realistic modeling of the cambered wing. Then a parametric study is conducted to evaluate the aerodynamic performance in terms of the elastic modulus of leading edge and vein. Consequently, the elastic modulus plays a key role in enhancing the aerodynamic performance of FW-MAVs.

키워드

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