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Drag-lift conversion characteristics of vertical axis wind turbine with adapting wind speed |
QU Jianjun1, WANG Jingyuan1*, XU Mingwei1, LI Yan2 |
1.School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China; 2.Engineering College, Northeast Agricultural University, Harbin, Heilongjiang 150030, China |
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Abstract In order to study change rules of VAWT-SWS operating mode, a vertical blade wind turbine with movable and fixed blades was designed and fabricated. At the same time, a straight blade vertical axis wind turbine with the same shape as the movable-fixed blade was produced. Under the condition of fixed wind speed and wind turbine height, influences of the number of blades and diameter of wind turbine on the drag-lift operation mode of self-adaptive wind speed vertical wind turbine were studied by increasing the number and length of the support arm. By means of wind tunnel experiment, the variation of torque of wind turbine with speed ratio is obtained, and compared with the vertical wind turbine with the same parameters, the working mode of the adaptive wind speed vertical axis wind turbine was determined by the proximity of the torque as the criterion. The results show that under certain conditions, the adaptive wind speed vertical axis wind turbine can automatically convert the wor-king mode, which can reduce the required speed ratio for wind turbine resistance conversion by increasing the number of blades, and increases the required speed ratio by increasing the diameter of the wind turbine. The results can provide theoretical guidance for the design of adaptive wind speed vertical axis wind turbine.
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Received: 26 August 2017
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