This study analyzes the aerodynamic and structural characteristics of an H-Darrieus vertical-axis wind turbine (VAWT) under varying inlet velocities using transient analysis. The k-ε turbulence model and six-DOF were applied to simulate urban environments in the flow analysis, while the structural analysis considered blade momentum of inertia and RPM conditions. The numerical results showed that the drag and lift forces increased by 60% and 53% respectively from the nominal wind speed to the cut-off wind speed conditions. Structural analysis indicated that the maximum Von-Mises stress in the blade did not exceed the yield strength of 69 MPa of PC-ABS, ensuring structural stability. However, the connecting rod exceeded the yield strength of SPCC 270 MPa, suggesting potential failure due to repeated rotational loads. This study confirms that materials with a yield strength of more than 1,100 MPa required for connecting rods to ensure reliable operation at high wind speed. These findings provide important insights for the design of robust VAWTs suitable for extreme environments.

본 연구에서는 “S”자 다리우스 형 블레이드는 입체적 곡선의 형상으로 미적인면을 고려하여 독창적으로 고안 하였다. 실험용 모형제작을 위하여 4가지 단면 블레이드모형을 K-표준 모델을 기초로 한 CFD 시뮬레이션을 통해 그 성능을 상대적으로 평가하였다. 수치해석은 풍향을 0°, 90°, 180°, 270°로 그 주위의 유동장과 압력장을 해석하였으며, 각 블레이드에 작용하는 Torque와 Power 값을 확인하였다. 블레이드의 효율은 전체적으로 풍향이 0°일 때 높게 나타났으며, Type D에 비해 Type A, B, C는 높은 것으로 나타났다.