基于滑移网格的双风轮垂直轴风力机气动性能研究

Research on Aerodynamic Performance of Dual-Wheel Vertical-Axis Wind Turbine Based on Sliding Mesh

为提高阻力型垂直轴风力机的风能利用率,创新性地提出了一种双风轮阻力型垂直轴风力机。由于狭管效应,流经两风轮之间的风速会相对增大,这有利于提高该双风轮风力机的效率。采用滑移网格技术对双风轮和单风轮风力机进行了数值模拟,结果表明:双风轮的正风区均位于两风轮之间区域时,相同工况下,双风轮风力机的风能利用率均高于对应单风轮的效率,当尖速比λ=0.8时,风能利用率C p之差最大为2.45%;双风轮风能利用率随着双风轮间距的增大先增大后减小。研究结果可为双风轮风力机的应用提供理论支撑。

In order to improve the wind energy utilization rate of the resistance type vertical axis wind turbine,a dual-wheel resistance type vertical axis wind turbine was innovatively proposed.Due to the narrow tube effect,the wind speed flowing between the two wind wheels will relatively increase,which is beneficial to improve the efficiency of the double wind turbine.In this paper,the sliding mesh technology is used to numerically simulate dual-wheel and single-wheel wind turbines.The results show that when the positive wind area of the double wind turbine is located between the two wind turbines,the wind energy utilization rate of the double wind turbine is higher than the efficiency of the corresponding single wind turbine under the same working conditions.Whenλ=0.8,the maximum difference of Cp is 2.45%.The double-wheel wind energy utilization rate increases firstly and then decreases with the distance between the double-wheel rotors.The research results can provide theoretical support for the application of dual wind turbines.