北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (2): 285-292.doi: 10.13700/j.bh.1001-5965.2016.0114

• 论文 • 上一篇    下一篇

混合重叠网格插值方法的改进及应用

黄宇1, 阎超1, 王文1, 席柯2   

  1. 1. 北京航空航天大学 航空科学与工程学院, 北京 100083;
    2. 中国兵器工业导航与控制技术研究所, 北京 100190
  • 收稿日期:2016-01-29 出版日期:2017-02-20 发布日期:2016-06-30
  • 通讯作者: 阎超,E-mail:yanchao@buaa.edu.cn E-mail:yanchao@buaa.edu.cn
  • 作者简介:黄宇,男,博士研究生。主要研究方向:计算流体力学、非结构混合网格;阎超,男,博士,教授,博士生导师。主要研究方向:计算流体力学、空气动力学。

An improved interpolation method for hybrid overset grid and its application

HUANG Yu1, YAN Chao1, WANG Wen1, XI Ke2   

  1. 1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. Institute of Ordnance Industry Navigation and Control Technology, Beijing 100190, China
  • Received:2016-01-29 Online:2017-02-20 Published:2016-06-30

摘要: 混合重叠网格间合理插值是保证流场计算正确的基础之一。本文针对重叠区网格尺寸匹配度较差时插值误差较大问题,发展了一种新型混合重叠网格插值方法,通过使用二阶精度插值、按单元尺度区分和扩充模板,改善了插值区网格尺寸匹配度较差时的插值精度。本文方法适用于任意单元类型的混合网格重叠,对各类单元处理透明,实现简单。计算结果表明,采用本文方法在网格重叠区流场变量传递正确有效,插值区网格尺寸匹配度较差时,相比原始方法,等值线过渡更为光滑,变量经过插值区耗散更小,计算与试验值符合更好。

关键词: 计算流体力学, 混合网格, 重叠网格, 插值方法, 插值精度

Abstract: For overset grid, reasonable interpolation between grids is one of the bases to ensure correct calculation of flow fields. In this paper, a new interpolation method for hybrid overset grid is presented, which focuses on the elimination of interpolation error coming from the grids mismatch at the intergrid boundary. With the combination of second order accuracy interpolation and proper selection and expansion of interpolation template by grid size, the interpolating accuracy of the cases with poor overset grids matching is improved. The presented method is suitable for arbitrary polyhedral grid and easy to be implemented. Compared with original method, numerical tests show that the presented method interpolates flow field variables with less dissipation when bad grids matching happened at the intergrid boundary, the variable contour at the intergrid boundary is smoother, and computational results agree more with the experimental data.

Key words: computational fluid dynamics, hybrid grid, overset grid, interpolation method, interpolation accuracy

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