Journal of Engineering Research

Low-wind-speed regions are abundant in wind energy resources but suffer from low utilization efficiency, where vertical-axis wind turbines demonstrate superior adaptability in light wind conditions. This study proposes a multi-objective optimization design method to enhance turbine performance by adjusting blade chord length, twist angle, and lift coefficient distribution, thereby achieving coordinated improvements in power coefficient and startup efficiency. Through a strategy combining numerical simulation and optimization algorithms, aerodynamic characteristics and performance of different design schemes were systematically compared. Results indicate that the multi-objective optimization significantly improves output power and startup responsiveness of vertical-axis turbines under low wind speeds, providing an effective design approach for small-wind energy utilization.

Low wind speed; Vertical-axis wind turbine; Blade aerodynamic configuration; Multi-objective optimization; Power coefficient