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在叶素动量理论(BEM理论)的基础上,综合考虑了风力机叶片叶尖和轮毂损失、叶栅效应、轴向速度诱导因子修正以及失速延迟修正,建立了风力机气动性能计算模型,使其准确性进一步得到提升。文中以10 kW定桨距失速型风力机叶片为例,采用上述改进的BEM理论计算模型,利用MATLAB编程,计算了其气动性能,并与国际认证的风力机计算软件GH-Bladed的计算结果进行了对比,其一致性说明了文中模型具有良好的准确性和实用性。
Based on the theory of elemental momentum (BEM), the aerodynamic performance of wind turbine is calculated by considering the blade tip and hub loss, cascade effect, axial velocity induced factor correction and stall delay correction Its accuracy is further enhanced. In this paper, a 10 kW pitch propeller-type wind turbine blade is taken as an example. Based on the improved BEM theory model and the MATLAB programming, the aerodynamic performance is calculated and compared with GH-Bladed, an internationally certified wind turbine calculation software In contrast, its consistency shows that the model has good accuracy and practicability.