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NUMERICAL INVESTIGATION OF SHOCK-BUFFET ON TRANSPORT AIRCRAFT WITH CHANGING THE POSITION OF NACELLE/PYLON

항공기 Nacelle/pylon 위치에 따른 Shock-Buffet 현상의 수치적 연구

  • Kim, S.H. (Dept. of Aerospace Engineering, Pusna Univ.) ;
  • Yee, K.J. (Dept. of Mechanical & Aerospace Engineering, Seoul Univ.) ;
  • Oh, S.J. (Dept. of Aerospace Engineering, Pusna Univ.)
  • 김성환 (부산대학교 항공우주공학과) ;
  • 이관중 (서울대학교 기계항공공학부) ;
  • 오세종 (부산대학교 항공우주공학과)
  • Received : 2014.09.12
  • Accepted : 2014.09.23
  • Published : 2014.09.30

Abstract

The shock buffet on a transonic transport aircraft are negative factors that reduce the aerodynamic performance of aircraft. The parametric studies were performed for position of nacelle/pylon to estimate the trend of flow mechanism under the wing that affects shock buffet. To generate external mesh of aircraft configuration that change the position of nacelle, snappyHexMesh provided in OpenFOAM was applied. Implicit density-based solver(ISAAC) was used for flow analysis. The change of nacelle position along horizontal direction dynamically affected the aerodynamic performance of transonic transport aircraft as comparing that of vertical direction. As a result of the parametric study of nacelle/pylon position, it was confirmed that the optimal position of nacelle can be obtained by aerodynamic design.

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