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민병문(B.M.Min),노태수(T.S.No),정성남(S.N. Jung),최석우(S.W.Choi),송승호(S.H.Song) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
In This paper, an efficient modeling method of wind turbine system is proposed using multi-body dynamics This method is based on representing a wind turbine system as a multi-system with several rigid bodies Also, simulation software WINSIM is developed to evaluate performance of wind turbine system simulation results show that proposed modeling method and simulation software is efficient and reliable
HART Ⅱ 로터-동체 모델의 CFD/CSD 연계해석과 동체효과 분석
사정환(J.H. Sa),유영현(Y.H. You),박재상(J.S. Park),박수형(S.H. Park),정성남(S.N. Jung),유영훈(Y.H. Yu) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
A loosely coupling method is adopted to combine a computational fluid dynamics (CFD) solver and the comprehensive structural dynamics (CSD) code, CAMRAD Ⅱ, in a systematic manner to correlate the airloads, vortex trajectories, blade motions, and structural loads of the HART Ⅱ rotor in descending flight condition. A three-dimensional compressible Navier-Stokes solver, KFLOW, using chimera overlapped grids has been used to simulate unsteady flow phenomena over helicopter rotor blades. The number of grids used in the CFD computation is about 24 million for the isolated rotor and about 37.6 million for the rotor-fuselage configuration while keeping the background grid spacing identical as 10% blade chord length. The prediction of blade airloads is compared with the experimental data. The current method predicts reasonably well the BVI phenomena of blade airloads. The vortices generated from the fuselage have an influence on airloads in the 1st and 4th quadrants of rotor disk. It appeared that presence of the pylon cylinder resulted in complex turbulent flow field behind the hub center.