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.

Abstract
1. 서 론
2. 연구 방법
    2.1 수치 해석 대상 및 설계
    2.2 지배방정식
    2.3 수치해석 조건
3. 결과 및 고찰
    3.1 유입 유속에 따른 유동특성 결과 분석
    3.2 RPM에 따른 구조 해석결과 및 안정성분석
4. 결 론
References

• 서병연(Graduate School of Mechanical Engineering, Kongju National University) | Byung-Yeon Seo
• 오승훈(Graduate School of Mechanical Engineering, Kongju National University) | Seung-Hun Oh
• 서현규(Division of Mechanical & Automotive Engineering Kongju National University) | Hyun Kyu Suh Corresponding author