A Review on H-Type Rotor Vertical Axis Wind Turbine Performance
Keywords:
Wind Turbine, MATLAB, Pitch, Angle of Attack, Lift, Drag.Abstract
Angle of attack is a well-developed and widely-used approach in modern horizontal axis wind turbines in operation. However, its application in vertical axis wind turbines (VAWTs) is restricted by the obscurity in its functional mechanism. After, a single tube stream model composed of genetic algorithm and MATLAB Simulink simulation modules is built to search for angle of attack that can maximize turbine torque. A MATLAB Simulink model is used as a performance evaluation tool because of its high computational efficiency. It is Variable pitch (VP) approach to increase the peak torque coefficient of the straight-bladed vertical-axis wind turbine (VAWT). The VP-approach provides a curve of pitch angle designed for the blade operating at the rated tip speed ratio (TSR) corresponding to the peak torque coefficient of the fixed pitch (FP)-VAWT. It describes the effects from four aspects, including the lift, drag, angle of attack (AoA), and torque, through a comparison between VP- VAWTs and FP-VAWTs working at three TSRs.
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