西安交通大学能源与动力工程学院,西安,710049
网络首发:2011-09-10,
纸质出版:2011
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吕坤, 谢永慧, 张荻. 风力机翼型挥舞摆振非定常气动特性分析[J]. 西安交通大学学报, 2011,45(9):47-53+100.
Investigation of Unsteady Aerodynamic Performance for Wind Turbine Airfoil[J]. 2011, 45(9): 47-53+100.
参考实际运行状态下的风力机翼型
应用动网格并采用k-ω SST湍流模型对NREL S809翼型在Re=1×10
6
情况下的翼型振荡进行了数值模拟
同时分析了挥舞、摆振及二者耦合振动对风力机翼型气动性能的影响.结果表明:相同振幅和频率下
翼型挥舞比摆振引起的气动力波动大得多; 翼型未达到失速时
翼型吸力面的流动分离可以使翼型获得额外的升力; 挥舞的振幅或频率较大时
翼型会发生失速
且来流攻角越大
挥舞使得翼型更易发生失速; 在挥舞-摆振耦合引起的翼型气动力变化中
挥舞起主导作用.
The moving mesh and the k-ω SST model were adopted to simulate the aerodynamic performance of the NREL S809 airfoil at the Reynolds number of 1×10
6
. The effects of flapwise
edgewise and combined flap/lead-lag oscillations on the aerodynamic performance of the airfoil were analyzed. The results show that the aerodynamic fluctuation caused by flapwise oscillation is much larger than that caused by edgewise oscillation with the same amplitude and frequency. The lift is greater due to flow separation on the suction surface of the airfoil when the airfoil is not in stall status. Larger amplitude and higher frequency of the oscillation will lead to dynamic stall of the airfoil
and the dynamic stall of the airfoil occurs more easily with the increase in the attack angle. In addition
flapwise oscillation plays a dominant role in the aerodynamic fluctuation caused by combined flap/lead-lag oscillation.
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