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SU2를 이용한 Advanced Rotorcraft 에어포일 유동해석
김태순(Taesoon Kim),김승태(Seungtae Kim),김민우(Minwoo Kim),김준규(Junkyu Kim),지솔근(Solkeun Jee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
The goal of this study is to numerically investigate the aerodynamic characteristics of an advanced rotorcraft airfoil. A rotorcraft main rotor in the advancing side encounters high-speed flow, whereas, in the retreating side, the rotor needs to avoid dynamic stall for high-thrust or high-speed-forward maneuvers. Consequently, a high drag-divergence Mach number is preferred for the advancing side, and a high lift with good dynamics stall characteristics is critical for the retreating side. The VR-12 airfoil, which satisfies such challenging conditions, was recently developed and has been successfully applied to advanced helicopters. Therefore, the VR-12 airfoil is chosen in the current numerical study. Unsteady Reynolds-averaged Navier-Stokes (URANS) simulation is performed with the Spalart-Allmaras turbulence model. Fully turbulent flow condition for the RANS model is used. The pressure profiles along with integral quantities, including the aerodynamic lift, drag, and moment, are compared with wind tunnel experiments and CFL3D numerical analysis data. Good agreement was achieved across angles of attack for the airfoil.