Overspeed Control of a Variable-Pitch Vertical-Axis Wind Turbine by Means of Tail Vanes

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概要

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• This paper describes the overspeed control of a vertical-axis wind turbine (VAWT) without an electric control system or mechanical brakes. To improve its performance with straight blades, a VAWT with a variable-pitch mechanism consisting of a four-bar linkage was designed. This wind turbine exhibits directivity to the wind, which is able to make use of rotational speed control in a VAWT. This wind turbine can achieve passive yaw control by means of tail vanes, which are installed on the eccentric link lever. The yaw angle characteristics of the tail vanes were measured in an open-circuit wind tunnel and in field tests. The yaw angle variations from the numerical analysis are in good agreement with the experimental data from the wind tunnel tests. It was found that overspeed prevention by means of tail vanes is useful in protecting a VAWT from strong winds without using mechanical brakes.

著者

• KOMATSU Nobuyoshi

  School of Mechanical Engineering, Kanazawa University

• YAMADA Tatsuro

  Assembling Shop No. 2, Production Dept., Machine Tool Div., Mitsubishi Heavy Industries, Ltd.

• KIWATA Takahiro

  Research Center for Sustainable Energy and Technology, Kanazawa University

• KITA Tetsuyoshi

  Betsukawa Corporation

• HIRAI Masao

  School of Mech. Eng., Kanazawa University

• KONO Takaaki

  Research Center for Sustainable Energy and Technology, Kanazawa University

関連論文

• Flow Structure of a Coaxial Circular Jet with Axisymmetric and Helical Instability Modes
• Performance of a Vertical Axis Wind Turbine with Variable-Pitch Straight Blades utilizing a Linkage Mechanism
• Flow Characteristics of a Plane Jet with an Extended Lip-Plate and Serrated Tabs
• Overspeed Control of a Variable-Pitch Vertical-Axis Wind Turbine by Means of Tail Vanes

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