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中文摘要：
本文依据指数律的风速分布曲线，采用CFD方法对切变入流情况下风力机的三维非定常气动特性进行了模拟。研究发现风切变指数的大小对叶片整体载荷有着较大的影响，当风切变指数值由0．15增至0．25，载荷波动振幅增大了约60％。并且，气动载荷的波动曲线相对叶片方位角存在一定的相位滞后，在靠近叶根位置这种非定常特性尤为明显。
英文摘要：
Based on the exponential distribution of wind speed profile, the 3-dimensional unsteady aerodynamic characteristics of wind turbine under wind shear inflow condition are simulated with CFD method. It was found that the value of wind shear exponent have a great influence on the aerodynamic load acting on the blade. When the wind shear exponent increased fi＇om 0.15 to 0.25, the amplitude of load fluctuation increased nearly 60%. Also, there is a phase lag between the aerodynamic load fluctuation curve and the azimuth angle of the blade, which is especially obvious in the vicinity of the blade root.
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