Abstract: With the rapid development of Computational Fluid Dynamics, the problems to be solved with CFD are becoming more and more complex. However, the traditional unified body-fitted grids structure has been unable to meet the needs of development of CFD. Unstructured mesh appears and attracts the CFD researchers’ attention with new features by breaking the habit of structured thinking. And the unstructured grid with boundary layer is always a difficult problem in unstructured grid generation. The paper studies the grid generating method for unstructured tetrahedral, at the same time, combined with the technological advantages of Spider software platform structure grid parameters of boundary layer propulsion, based on it, unstructured mesh generation module UGCS development is done. The large number of examples of grid generation results, mainly grid quality and numerical calculation, fully verify the reliability and the robustness of algorithm.

Key words: complicated surface, unstructured mesh, boundary layer mesh, mesh generation automation

摘要： 随着计算流体力学领域待解决问题复杂程度的不断提高，传统的统一贴体结构网格已不能很好地满足针对复杂外形的高精度网格生成需求，而非结构网格以其独特优势受到CFD工作者的普遍关注。带有附面层的非结构网格是非结构网格生成的难点。进行了非结构四面体网格的生成方法研究，同时结合Spider软件平台中结构网格参数化附面层推进的技术优势，进行了基于Spider软件平台中非结构网格生成模块“UGCS”的开发。通过分析大量网格生成实例中网格质量和数值计算结果，验证了算法的可靠性与鲁棒性。

关键词: 复杂外形, 非结构网格, 附面层网格, 网格生成自动化