Effect of airfoil and solidity on performance of small scale vertical axis wind turbine using three dimensional CFD model
2017; Elsevier BV; Volume: 133; Linguagem: Inglês
10.1016/j.energy.2017.05.118
ISSN1873-6785
AutoresAbhishek Subramanian, S. Arun Yogesh, Hrishikesh Sivanandan, Abhijit Giri, Madhavan Vasudevan, Vivek Mugundhan, Ratna Kishore Velamati,
Tópico(s)Aerodynamics and Fluid Dynamics Research
ResumoThis paper presents a study on the effect of solidity and airfoil profile on the performance of Vertical Axis Wind Turbines (VAWTs). A 1.1 kW commercially viable Darrieus VAWT was studied using ANSYS Fluent. Four different airfoils – NACA 0012, NACA 0015, NACA 0030 and AIR 001 – were considered in the analysis. The tip speed ratios (λ) were varied from 1 to 2.5 with an incoming wind velocity of 10 m/s. It was observed that NACA 0030 performed better at lower values of λ due to long duration of attached flow; while NACA 0012 performed better at λ > 1.8 with a wider range of λ. The shed vortex dissipates much faster for thinner airfoils than for thicker airfoils at higher values of λ. Two bladed VAWTs generated more power than the three bladed turbines. This indicated that turbines with lower solidity perform better at high λ.
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