Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Computational Fluid Dynamics of the aerodynamic characteristics for Flying Wing configuration with Flaperon

플래퍼론이 전개된 플라잉윙 형상의 공력 특성에 대한 전산유동해석

  • Ko, Arim (ULV and LSA Certification Team, UAS Safety Division, Korea Institute of Aviation Safety Technology) ;
  • Chang, Kyoungsik (School of Mechanical Engineering, Ulsan University) ;
  • Park, Changhwan (Department of Aeronautical & Mechanical Engineering, Hanseo University) ;
  • Sheen, Dongjin (Department of Aeronautical & Mechanical Engineering, Hanseo University)
  • 고아림 (항공안전기술원 드론안전본부 경량인증팀) ;
  • 장경식 (울산대학교 기계공학부) ;
  • 박창환 (한서대학교 항공기계학과) ;
  • 신동진 (한서대학교 항공기계학과)
  • Received : 2019.07.01
  • Accepted : 2019.09.09
  • Published : 2019.10.31
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Abstract

The flying wing configuration with high sweep angles and rounded leading edge represent a complex flow of structures by the leading edge vortex. For control of the tailless flying wing configuration with unstable directional stability, flaperon is used. In this study, we conducted numerical simulations for a non-slender flying wing configuration with a rounded leading edge and analyzed the effect of the sideslip angle and flaperon. Through aerodynamic coefficient analysis, it was found that the effect of AoS on lift and drag coefficient was minimal and the side force and moment coefficient were markedly influenced by AoS. As the sideslip angle increased, the pitch break, which is related to the pitching moment coefficient, was delayed. Through stability analysis, the directional and lateral static stability of the flying wing configuration were increased by flaperon. Also, the structure and behavior of the leading edge vortex were analyzed by observing the contour of the pressure coefficient and the skin friction line.

높은 후퇴각을 갖는 둥근 앞전 날개 형상은 앞전 와류에 의해 복잡한 유동 현상이 나타난다. 불안정한 방향 안정성을 갖는 무미익 플라잉윙의 제어를 위해서 플래퍼론이 사용된다. 본 연구에서는 플래퍼론이 전개된 비세장형, 둥근 앞전의 플라잉윙 형상의 전산해석을 수행하였으며 옆미끄럼각 및 플래퍼론에 대한 영향을 분석하였다. 공력계수 분석을 통해 양력과 항력계수에 대한 옆미끄럼각의 영향은 적으며 측력 및 모멘트 계수는 옆미끄럼각의 영향을 크게 받음을 알 수 있었다. 정적 안정성 분석을 통해 플래퍼론이 전개된 플라잉윙의 가로안정성과 방향안정성이 좋아졌음을 확인하였다. 또한 압력계수분포, 표면 마찰선의 관찰을 통해 앞전 와류 구조 및 거동을 분석하였다.

Keywords

References

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