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力学学报  2015 

一种基于径向基函数的两步法网格变形策略

DOI: 10.6052/0459-1879-14-280, PP. 534-538

Keywords: 网格变形,径向基函数,黏性网格,网格交错,贪婪算法

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Abstract:

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NLR7301二维构型和带发动机短舱的DLRF6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.

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