一种基于约束框架的棱柱网格生成方法

摘要

提出了一种基于约束框架的棱柱网格生成方法，即利用物面网格节点与背景结构框架网格之间的单一映射关系线性插值生成棱柱网格。背景结构框架网格基于 TFI 方法生成。物面网格节点与背景框架网格之间的映射关系通过一种线性投影方法建立。然后通过 V 型槽、圆球、M6机翼和 F6翼身组合体四种不同外形对该棱柱网格生成方法进行了测试，测试结果表明该方法能够避免棱柱网格生成中的网格交叉现象，保证棱柱网格的成功生成。该方法在棱柱网格质量控制、棱柱网格局部修改等方面具有较好的效率和优势，但背景框架网格的生成依然是该方法的一个瓶颈，需要进一步的研究。%A prismatic grid generation method based on constrained frame is presented.The prismatic grid is generated by linear interpolation using one to one mapping between surface grid nodes and background structured grid frame.The background frame is generated by TFI meth-od.The one to one mapping is established using a linear projection method.Then,the prismatic grid generation method is tested through four different shape cases:V-shape groove,sphere,M6 wing and F6 wing-body.The test results show that this method can avoid overlapped cells and make prismatic grid generation successful.Finally,discussion about advantages and disadvanta-ges of the present method shows that this method functionates better on quality control and local modification of prismatic grid,but the generation of background grid frame is still a bottleneck and need further investigation.