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在风力机流场及其气动性能分析中,计算流体动力学(CFD)方法已受到越来越广泛的关注。近年来出现的致动模型,以在流场中添加体积力源项的形式模拟风力机与三维流场之间的相互作用,极大简化了CFD计算的网格前处理过程、降低了三维CFD计算的网格数量,为大尺度风场的工程计算提供了有效途径。本文研究了致动模型中体积力源项的分布形式,以前期建立的黏性无黏耦合模型为基础构建了新型致动体模型。该模型基于黏性无黏耦合模型提供的压力分布,在叶片真实的三维几何表面布置体积力源项,从而在源头上降低了致动模型所引入的体积力源项分布误差,提高了现有致动模型对叶片三维几何形状的计算精度。
In the wind turbine flow field and its aerodynamic performance analysis, computational fluid dynamics (CFD) method has received more and more attention. In recent years, the actuation model, which simulates the interaction between the wind turbine and the three-dimensional flow field in the form of adding the source of bulk force in the flow field, greatly simplifies the grid pretreatment process of CFD calculation and reduces the 3D CFD The number of grids calculated provides an effective way for engineering calculation of large scale wind farm. In this paper, the distribution of the source of bulk force in the actuated model is studied. A new type of actuator model is constructed based on the viscous and non-viscous coupling model. Based on the pressure distribution provided by the viscous and non-viscous coupling model, this model arranges the bulk force source terms on the real three-dimensional geometric surfaces of the blade, thus reducing the distribution errors of the bulk force source items introduced by the actuation model at the source, Calculation accuracy of dynamic model on three - dimensional blade geometry.