几何特征的六面体网格剖分方法

为了保证自适应性以及生成网格与总体网格之间的协调性，针对结构规则的复杂局部特征的网格剖分过程，提出了几何特征的六面体网格剖分方法.首先，分析了几何特征的类型以及网格剖分流程，并以此为基础将与几何特征网格剖分相关的参数进行分类.然后，通过将参数化的设计思想分别引入实体分离、特征体分解、网格生成等几何特征网格剖分环节，建立从几何特征信息到网格剖分细节（如边网格数、网格剖分策略等）的参数驱动机制，并构建几何特征网格剖分数据库，使得与几何特征对应的参数驱动机制固化在网格剖分程序中.最后，分别在不同单元尺寸情况下，对涡轮叶片上的气膜孔和扰流柱特征进行六面体网格剖分.实验结果表明了所述方法的可行性和稳定性.

Hexahedral mesh generation method for geometric features

In order to guarantee self-adaptability of geometric features and coordination between meshes of geometric features and overall structure, a hexahedral mesh generation method for geometric features was proposed which focuses on generating high-quality hexahedral meshes for local complex features having regular structures. Firstly, types of geometric features and meshing processes of geometric features were analyzed, based on which parameters relevant to meshing processes of geometric features were separated into two categories, real and virtual parameters. Subsequently, through integrating the design thought of parameterization into geometric features' three typical meshing processes including entity separation, feature decomposition and mesh generation, a parameter-driven mechanism transferring information from geometric features into meshing details (such as numbers of elements of edges, specific meshing strategies, etc) was built. Also, meshing database for geometric features was established so as to solidify the parameter-driven mechanism corresponding to geometric features into meshing programs. Finally, film-cooling holes and spoiling posts of turbine blades were meshed under different designated element sizes. Meshing results reveal the applicability and stability of the method proposed.