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study of the self-starting performance of a vertical-axis wind turbine
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نویسنده
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xu z. ,dong x. ,li k. ,zhou q. ,zhao y.
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منبع
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journal of applied fluid mechanics - 2024 - دوره : 17 - شماره : 6 - صفحه:1261 -1276
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چکیده
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The self-starting performance of vertical-axis wind turbines (vawts) is crucial for their widespread utilization. conventional evaluation methods using the static torque coefficient (cts) or self-starting time have limitations. &the minimum 1st derivative of angular acceleration in the lift acceleration state& is proposed to serve as a suitable indicator for the completion of self-starting. understanding the behavior of the self-starting process in vawts is crucial for optimizing power output. a comprehensive methodology is used that integrates experiments and computational fluid dynamics (cfd). wind tunnel experiments are conducted to evaluate the self-starting and power output performance of the turbines. cfd is employed utilizing the fluent 6dof module to investigate the torque and flow field characteristics during the self-starting process. additionally, the objectives of our study are to investigate the effect of static evaluation methods on the dynamic start-up process and to explore the effects of airfoil type, pitch angle, and inlet wind speed on the self-starting behavior of turbines. the results indicate that a high cts ensures initial rotation, but the subsequent self-starting time remains independent of this factor. increasing the pitch angle enhances the self-starting performance. at an inlet speed of 5 m/s, for the naca2418 airfoil turbine, the self-starting times for pitch angles of 10 ° and 5 ° are reduced by 20% and 12%, respectively, compared to that for 0 °. the naca0018 airfoil turbines with pitch angles of 0 ° and 5 ° fail to complete self-starting. the airfoil type also plays a crucial role, with the naca2418 airfoil demonstrating superior self-starting performance and power performance. furthermore, the minimum self-starting wind speed of the naca0018 airfoil turbine was explored and determined be between 5.5 m/s and 6 m/s. the utilization of this novel self-starting evaluation method addresses the limitations of traditional approaches, providing a more universally applicable interpretation of the characteristics of turbine self-starting behavior.
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کلیدواژه
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vertical-axis wind turbine ,self-starting performance ,evaluation method ,wind tunnel experiment ,transient numerical simulation
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آدرس
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zhejiang university of technology, college of mechanical engineering, china, zhejiang university of technology, college of mechanical engineering, china, zhejiang university of technology, college of mechanical engineering, china, zhejiang university of technology, college of computer science and technology, china, zhejiang university of technology, college of mechanical engineering, china
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پست الکترونیکی
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zhaoyh@zjut.edu.cn
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Authors
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