Numerical simulation of aerodynamic characteristics of straight-bladed vertical axis wind turbine with large solidities
LI Yan1,2*, TONG Guoqiang1, QU Chunming1, FENG Fang2,3
1. College of Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; 2. Heilongjiang Provincial Key Laboratory of Renewable Resources Utilization Technology and Equipment in Cold Regions, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; 3. College of Arts and Sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Abstract：Solidity is one of the important structural parameters that affect the aerodynamic characteristics of vertical axis wind turbines. The NACA0018 airfoil small straight-bladed vertical axis wind turbine was used as the object. Two large solidities of 0.30 and 0.35 were selected. The number of blades in each solidity was 3, 4, and 5 respectively. The method of numerical simulation was used to study the static starting characteristics and dynamic power characteristics of the straight-bladed vertical axis wind turbine. The results show that: in the case of large solidity, the number of blades has a greater influence on the aerodynamic characteristics of the wind turbine. At the same degree solidity, the increase of the blades number can improve the fluctuation of the static torque coefficient at various azimuth angles, and reduce the reverse torque, but decrease the maximum torque coefficient; In the rotating state, the increase in the number of blades will decrease the power coefficient rising speed before the optimal tip speed ratio, reduce the power coefficient, and decrease the power coefficient reduce speed after the optimal tip speed ratio. When the number of blades is the same, the static ave-rage torque coefficient of a wind turbine with 0.35 of solidity is large, and the torgre coefficients at most of the azimuth are greater than those with 0.30 of solidity; However, with respect to the rotating state, the maximum power coefficient of a wind turbine with a 0.30 solidity is greater than that of wind turbine with a 0.35 wind turbine.
李岩*,佟国强,曲春明,冯放,. 具有大实度直线翼垂直轴风力机气动特性数值模拟[J]. 排灌机械工程学报, 2022, 40(7): 701-706.
LI Yan*,TONG Guoqiang,QU Chunming,FENG Fang,. Numerical simulation of aerodynamic characteristics of straight-bladed vertical axis wind turbine with large solidities. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(7): 701-706.
