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임계 받음각에서 NACA4412 에어포일 주위 유동의 큰 에디 모사
안은혜(Eunhye Ahn),이정일(Jungil Lee),최해천(Haecheon Choi) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The flow characteristics over NACA4412 airfoil near stall are investigated using large eddy simulation (LES) at the Reynolds number of 1.64×10<SUP>6</SUP> based on the chord length (c) and free stream velocity (U<SUB>∞</SUB>). This flow is challenging to simulate because it contains thin turbulent boundary layer, separation near the trailing edge, and wake. Various flow characteristics are presented at the critical angle of attack of 12° , and the results are compared with those from Wadcock’ experiment. Moreover, the flow phenomena at a few more angles of attack before and after stall are presented.