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

  • 제38권7호
  • /
  • Pages.629-636
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  • 2010
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
권호 표지
DOI QR코드

DOI QR Code

향상된 자유후류 기법을 이용한 비정상 로터-동체 상호작용 시뮬레이션

Simulation of Unsteady Rotor-Fuselage Interaction Using an Improved Free-Wake Method

  • 이준배 (부산대학교 항공우주공학과 대학원) ;
  • 서진우 (부산대학교 항공우주공학과 대학원) ;
  • 이재원 (부산대학교 항공우주공학과 대학원) ;
  • 이관중 (부산대학교 항공우주공학과) ;
  • 오세종 (부산대학교 항공우주공학과)
  • 투고 : 2010.04.07
  • 심사 : 2010.06.17
  • 발행 : 2010.07.01
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초록

본 논문에서는 시간전진 자유후류 모델이 고려된 비정상 패널 코드를 이용하여 비정상 로터-동체 상호작용에 대한 수치적 해석기법에 대한 연구를 수행하였다. 이전 개발된 시간전진 자유후류 모델이 고려된 비정상 패널 코드는 후류와 깃(Blade)이 아주 근접한 경우에 불안정성이 발생하였다. 이를 제거하기 위해 장속도 기법을 적용하여 코드를 개선하였다. 개선된 코드를 이용하여 NASA에서 실험된 ROBIN(ROtor Body Interaction) 형상에 대한 해석을 수행하였다. 로터가 있을 때와 없을 때의 동체 표면 압력과 유도 유입류의 비를 실험결과 및 기존 수치해석 결과들과 비교하였다. 개발된 코드는 로터-동체 상호 작용으로 인해 발생하는 유동 특성과 생성되는 복잡한 후류의 형상을 잘 예측하였다.

This study is to investigate the aerodynamic effects of the Rotor-Fuselage Interactions in forward flight, and is conducted by using an improved time-marching free-wake panel method. To resolve the instability caused by the close proximity of the wake to the blade surface, the field velocity approach is added to the prior unsteady panel code. This modified method is applied to the ROBIN(ROtor Body Interaction) problem, which had been conducted experimentally in NASA. The calculated results, pressure distribution on fuselage surface and induced inflow ratio without and with the rotor, are compared with the experimental results. The developed code shows not only very accurate prediction of the aerodynamic characteristics for the rotor-fuselage interaction problem but also the rotor wake development.

키워드

참고문헌

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피인용 문헌

  1. Wake Structure of Tip Vortex Generated by a Model Rotor Blade of NACA0015 Airfoil Section vol.39, pp.3, 2011, https://doi.org/10.5139/JKSAS.2010.39.3.210
  2. Verification of the Open Source Code, OpenFOAM to the External Flows vol.39, pp.8, 2011, https://doi.org/10.5139/JKSAS.2011.39.8.702