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Numerical Evaluation of Airfoils with Tilted Cavities for Vertical Axis Wind Turbines Applications
Ioana Octavia Bucur, Daniel Eugeniu Crunteanu, Madalin Dombrovschi

Last modified: 2023-06-29


Given the prevailing economic and social circumstances, there has been a notable rise in the demand for clean energy, with wind energy being among the most widely utilized sources of clean energy. This is attributed to the declining costs of wind energy technology and the significant advances being made in its technical capabilities. The compact design, low wind speed requirements for starting, and low noise levels of small-scale vertical axis wind turbines (VAWTs) make them a viable solution for urban environments. With advancements in VAWT technology and optimization, their efficiency has been significantly improved to a level that now allows them to compete with the more commonly used horizontal axis wind turbines (HAWTs). This study presented in this paper employs computational fluid dynamics (CFD) to conduct a numerical evaluation of multiple airfoil geometries that have been modified with tilted cavities of varying sizes. The objective is to identify the airfoil geometry that is best suited for VAWT applications, while maintaining a high lift coefficient and minimal impact on the drag coefficient. The base airfoil used in this analysis is the NACA0012, which is compared with the airfoils that have been modified with tilted cavities. The primary goal of this investigation is to develop an airfoil that is better suited for VAWT applications and enhances aerodynamic performance. The findings of this study indicate that one of the modified airfoils demonstrates superior aerodynamic characteristics compared to the NACA0012 airfoil.