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.