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采用非定常k-ω湍流模型和滑移网格技术,从安装角β=0°、β<0°和β>0°三个方面分析了安装角对直叶片升力型风轮气动特性的影响规律。研究得出,负安装角增大,有效提高了上盘面力矩,局部范围内减小了下盘面力矩。正安装角的增大,大幅度大范围降低了上盘面力矩,局部范围内大幅度提高了下盘面力矩。两者比较得出,负安装角可改善风轮的气动流场,增加风轮的风能利用系数。部分计算结果得到了试验结果验证,证明可以反映流场的真实信息。
The unsteady k-ω turbulence model and the slip-grid technique are used to analyze the influence of the mounting angle on the aerodynamic characteristics of straight-blade lift-type wind turbine from three aspects of installation angle β = 0 °, β <0 ° and β> 0 ° law. The study shows that the negative mounting angle is increased, the upper disc surface moment is effectively increased, and the lower disc surface moment is reduced in the local area. The increase of the mounting angle greatly reduces the upper disc surface moment and greatly improves the lower disc surface moment within a certain range. The comparison between the two shows that the negative mounting angle can improve the aerodynamic flow field of the wind wheel and increase the wind energy utilization coefficient of the wind wheel. Part of the calculation results have been verified by the test results, which can prove the real information of the flow field.