Airfoil Shape Impact Assessment for Improved Aerodynamics in Hybrid VAWT Applications
Efficient energy harnessing from renewable energy sources such as wind has gained significant importance in the quest for sustainable power generation. This study focuses on investigating the pivotal role of airfoil shape variations in augmenting the aerodynamic performance of a hybrid vertical axis wind turbine (VAWT). The performance metrics under scrutiny encompass the power coefficient and torque, crucial indicators of a turbine’s energy conversion capabilities. In the pursuit of enhancing turbine efficiency, an array of airfoil profiles was curated for evaluation. The selection of an optimal airfoil played a paramount role in shaping the initial investigation. The chosen airfoil, incorporated with a distinctive J-shaped configuration, was subjected to comprehensive analysis within the context of the hybrid VAWT design. The study delves into the intricate interplay between airfoil design and performance parameters. Of particular interest is the power coefficient, where notable advancements were observed. A peak power coefficient of 0.24 at a tip speed ratio (TSR) of 1.25. The investigation yielded a remarkable peak power output of 526 watts, achieved at a rotational speed of 26 revolutions per minute (RPM). Furthermore, a comparative analysis of computational fluid dynamics (CFD) and experimental results in terms of power coefficient (Cp) versus TSR was conducted, revealing a maximum percentage difference of 4.8%. This achievement underscores the tangible impact of the J-shaped configuration on the turbine’s energy conversion capabilities. The consequential increase in power output holds significant implications for enhancing the energy yield of the Hybrid VAWT in real-world applications.
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