复杂积冰翼型气动性能分析

Analysis on aerodynamic performance of complex iced airfoils

为了克服复杂外形难以划分结构化网格的问题,采用结构/非结构混合多块网格对复杂积冰翼型的气动性能-进行了分析计算.在靠近积冰边界的内层采用了非结构网格,在非结构网格外采用结构化网格以节省存储空间和计算时间.不同类型网格之间采用了点点对接的方式以简化通量重构的处理方式.整个流动区域采用SST湍流模型,求解了雷诺平均N-S方程.数值计算结果表明结构/非结构混合多块网格在复杂积冰翼型气动性能计算上的可行性,积冰对翼型的气动性能造成了严重的影响.

To classify smoothly the complex structured grid, the aerodynamic performance of complex iced airfoil with hybrid multi-block grid was analyzed and calculated. An unstructured grid was applied to the zone near the iced airfoil, whereas a structured grid was ap- plied to save the storage and computational time. The flux restructuring was simplified through point-to-point connection between different grids. The Reynolds-averaged N-S equations are solved using SST turbulence models the entire flow area. The results of numerical simulation show that structured/unstructured hybrid multi-block grid is feasible for calculating the aerodynamic performance of complex ice accretion, given the fact that ice accretion has serious influence upon aerodynamic performance of airfoil.