Enhancing Aerodynamic Performance of Vertical Axis Wind Turbine using Leading-edge Micro-cylinder
ID:9
Submission ID:137 View Protection:ATTENDEE
Updated Time:2022-05-13 14:46:27
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Oral Presentation
Abstract
Vertical axis wind turbines (VAWTs) are experiencing a regained interest for use in large-scale offshore wind energy generation. However, the aerodynamic performance of lift-type VAWTs is lower than that of horizontal axis wind turbines. Setting a micro-cylinder in front of the blade leading-edge as a passive flow control approach is proposed to improve the aerodynamic performance of VAWTs. Numerical simulations combined with response surface methodology are conducted to find the optimal parameters of the micro-cylinder. The response surface optimization is performed on the DOE/Sanida 17m VAWT. The optimization variables of the response surface optimization model are the dimensions and positions of the micro-cylinder and the objective is the maximum tangential force of the VAWT. The optimal power coefficients of the VAWT with micro-cylinder are increased by 66.2%, 17.7% and 3.2% for tip speed ratios of 2.2, 2.49 and 3.09 compared with those of the original VAWT. The flow filed analyses show that the large-scale flow separations around the blade at large angles of attack are supressed by the vortex shedding from the micro-cylinder, which leads to an obvious improvement of torque coefficient for the VAWT with micro-cylinder.
Keywords
vertical axis wind turbine,aerodynamic performance,numerical simulation,response surface methodology
Submission Author
Junwei Zhong
Jiangxi University of Science and technology
Huizhong Liu
Jiangxi University of Science and technology
Jingyin Li
Xi'An Jiaotong University
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