垂直轴风机功率增强的翼型与阵列优化

Optimization of Airfoil and Array for Power Enhancement of Vertical Axial Wind Turbine

针对H型垂直轴风机(Vertical Axis Wind Turbine,VAWT),通过计算流体动力学(Computational Fluid Dynamics,CFD)模拟,将翼型设计与涡轮阵列相关联,对比分析多种翼型及不同阵列条件下VAWT的转矩系数C_(m)、功率系数C_(P)和平均功率参数Ω。结果表明:与对称翼型相比,非对称翼型在高叶尖速比下功率系数较小,弯度效应可显著增大翼型在下风区的功率系数;在风场阵列中,三涡轮阵列优化后下风区涡轮功率显著提升,单涡轮功率可提升40%,风场整体功率提升约20%;针对海上牧场结构平面提出五涡轮阵列,优化后风场整体效率提升65%,单涡轮性能提升可达100%。研究成果对于提高深远海网箱系统功能与设计具有推动意义。

For H-type Vertical Axis Wind Turbine(VAWT),through Computational Fluid Dynamics(CFD)simulation,the airfoil design is associated with turbine array,and the torque coefficient C_(m),power coefficient C_(P)and average power parameterΩof the VAWT under various airfoils and different array conditions are compared and analyzed.The power coefficient of asymmetric airfoil is lower than that of symmetrical airfoil at high tip speed ratio,and the bending effect can significantly improve the power coefficient of the airfoil in downwind region.In the wind farm array,after the optimization of the three-turbine array,the turbine power in the downwind zone can be significantly increased,the single turbine power can be increased by 40%,and the overall wind farm power can be increased by about 20%.Five-turbine array is proposed for the structural plane of the sea pasture.After the optimization,the overall efficiency of the wind farm can be increased by 65%,and the performance of the single turbine can be improved by 100%.The research results are of promotion significance for improving the function and design of far-reaching marine cage system.