一种基于径向基函数的两步法网格变形策略

刘中玉; 张明锋; 聂雪媛; 杨国伟

doi:10.6052/0459-1879-14-280

一种基于径向基函数的两步法网格变形策略

中国科学院力学研究所流固耦合系统力学重点实验室, 北京100190

基金项目: 国家高技术研究发展计划资助项目(2014AA110501).

详细信息

通讯作者:
杨国伟,研究员,主要研究方向:计算流体力学、气动优化设计、气动弹性.E-mail:gwyang@imech.ac.cn

中图分类号: O241.3
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出版历程
- 收稿日期: 2014-09-15
- 修回日期: 2014-12-08
- 刊出日期: 2015-05-17

A TWO-STEP MESH DEFORMATION STRATEGY BASED ON RADIAL BASIS FUNCTION

Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, CAS, Beijing 100190, China

Funds: The project was supported by the National High-tech Research and Development Program of China (2014AA110501).

摘要

摘要: 基于径向基函数(RBF) 的网格变形方法是一种可靠的网格变形技术,对于任意拓扑的网格都能获得高质量的变形网格. 缩减控制点的RBF 网格变形方法可以大幅提高网格变形效率,但也存在变形后物面误差较大、边界层网格交错的问题. 在缩减控制点方法的基础上,提出了一种适合于带有边界层的黏性网格变形的方法,该方法从物面中选择两组控制点,利用其中一组控制点粗略计算变形后网格位置及变形误差,利用第二组控制点与变形误差插值得到更为精确的变形网格. 利用该方法完成带襟翼的NLR 7301 二维构型和带发动机短舱的DLR F6 翼身组合体的网格变形问题,结果表明该方法可以较大幅度降低变形网格的物面误差,并且有效避免边界层网格交错问题.
- 网格变形 /
- 径向基函数 /
- 黏性网格 /
- 网格交错 /
- 贪婪算法
Abstract: Mesh deformation method based on radial basis function (RBF) is a reliable technique to be used to obtain high-quality deformed mesh for arbitrary topology. Reduced control points method can greatly improve the efficiency of the mesh deformation, while there exists the problem of large deformation error on surface and inverted boundary layer mesh. In this paper a new mesh deformation method with viscous boundary layer mesh is developed. The method selects two groups of control points from the object surface, a set of control points to roughly calculate grid position and deformation error, and the second set of control points to get a more accurate deformed mesh with interpolation deformation error. Mesh deformation of NLR-7301 with flap and DLR-F6 wing-body-pylon-nacelle configuration is presented with the viscous mesh deformation method. Results show that the method can greatly reduce deformation error on surface and effectively avoid boundary layer mesh inverted.
- mesh deformation /
- radial basis function /
- viscous mesh /
- mesh inverted /
- greedy method

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