混合重叠网格插值方法的改进及应用

黄宇; 阎超; 王文; 席柯

doi:10.13700/j.bh.1001-5965.2016.0114

混合重叠网格插值方法的改进及应用

doi: 10.13700/j.bh.1001-5965.2016.0114

黄宇¹,
阎超^1, ,,
王文¹,
席柯²

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

详细信息

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

通讯作者:
阎超,E-mail:yanchao@buaa.edu.cn

中图分类号: V221⁺.3;TB553
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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-29
- 录用日期: 2016-04-29
- 网络出版日期: 2017-02-20

An improved interpolation method for hybrid overset grid and its application

HUANG Yu¹,
YAN Chao^{1
, ,},
WANG Wen¹,
XI Ke²

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

More Information

Corresponding author: YAN Chao,E-mail:yanchao@buaa.edu.cn

摘要

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。
- 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.
- computational fluid dynamics /
- hybrid grid /
- overset grid /
- interpolation method /
- interpolation accuracy

HTML全文

图 1 重叠区域网格尺寸不匹配

Figure 1. Mismatch of grid scale at overset area

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图 2 二阶插值示意图

Figure 2. Illustration of 2nd order interpolation

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图 3 3类插值单元和宿主单元重叠情况示意图

Figure 3. Three types of relationship of interpolation and donor cells at overset area

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图 4 第2类情况插值示意图

Figure 4. Illustration of second interpolation type

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图 5 第3类情况插值示意图

Figure 5. Illustration of third interpolation type

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图 6 RAE2822翼型重叠网格

Figure 6. Overset grid of RAE2822 wing figure

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图 7 2种插值方法的马赫数分布比较

Figure 7. Mach number contour distribution comparison of two interpolation methods

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图 8 翼面压力系数分布

Figure 8. Pressure coefficient distribution on wing surface

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图 9 2种插值方法的尾涡无量纲涡黏性分布对比

Figure 9. Rear eddy nondimensional viscosity contour distribution comparison of two interpolation methods

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图 10 2种插值方法的残差收敛情况对比

Figure 10. Comparison of residual error convergence history of two interpolation methods

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图 11 三维机翼挂架重叠网格

Figure 11. 3D overset grid of wing/pylon/store

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图 12 0.3 s时刻对称面和物面压力分布

Figure 12. Surface and symmetry pressure contour at 0.3 s

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图 13 初始时刻5°和185°子母线压力系数分布

Figure 13. Pressure coefficient distribution on circumferential location 5° and 185° at initial time

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图 14 外挂物质心和姿态角随时间变化

Figure 14. Variation of store movement and attitude angle with time

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