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致动面模型利用无厚度的平面代替风力机叶片,在平面上施加不连续压力来模拟叶片对气流的作用,结合N-S方程,在FLUENT中进行数值模拟计算,是对致动线方法的延伸与改进。运用该方法能够简化风力机的模型,从而减少网格数量和计算时间。采用线性分布下的致动面模型,提出一种致动面网格的辨识方法,对单台Nibe A型风力机的远近尾流区域进行模拟计算,包括尾流风速变化,湍流强度,涡结构,并将数值模拟的结果与致动线模型计算结果以及实验数据进行对比分析,主要是风轮后特定距离截面的风速变化,验证了致动面方法的优越性以及用于风力机尾流场计算的可行性。
Actuating surface model uses non-thickness plane instead of wind turbine blade, exerts discontinuous pressure in the plane to simulate the action of blade on airflow, and combines with NS equation, numerical simulation in FLUENT is an extension of the method of actuation line Improve. Using this method can simplify the wind turbine model, thereby reducing the number of grids and computing time. Using the linear model of the actuator surface model, a method to identify the mesh of the actuator surface is proposed to simulate the wake range of a single Nibe A-type wind turbine, including wake velocity variation, turbulence intensity, vortex structure The results of numerical simulation are compared with the calculated results of the moving line model and the experimental data. The main results are the change of wind speed at a certain distance cross section after the rotor and the superiority of the method of actuation surface and the wake flow field of wind turbine Calculation of feasibility.