CFD多块网格生成新进展

RECENT PROGRESS IN MULTI-BLOCK GRID GENERATION

网格生成是计算流体力学的重要组成部分,多块网格在CFD实践中获得了广泛的应用．结合对网格生成技术规范和网格生成系统的讨论，综述了多块网格近年来的新进展，重点评述了网格拓扑和网格拼接技术（包括所谓的连续拼接、非结构拼接和广义拼接），完整飞机外形多块网格生成策略，自动分块技术以及相应的块合井技术，CAD和CFD之间的数据交换技术和基于NURBS的曲面网格生成技术，网格质量分析和控制技术，若干网格生成新方法，以及多块网格在航空气动力数值模拟中的应用．

Grid generation is an essential part of computational fluid dynamics, and multi-block structured grid is the most widely used grid type. Combined with a discussion of the criteria for evaluation of grid generation systems, this paper reviews recent developments in multi-block grid generation with emphases on grid topology and grid block patching techniques, grid generation strategy for complete aircraft configurations, automatic blocking and the corresponding block merging methods, geometric data exchange between CAD and CFD system, NURBS-based surface grid generation techniques, analysis and control of grid quality, several new grid generation methods, and applications of multi-block grids in aerodynamics numerical simulation.