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重叠网格中隐式装配策略的改进

宣传伟 韩景龙

宣传伟, 韩景龙. 重叠网格中隐式装配策略的改进[J]. 北京航空航天大学学报, 2020, 46(2): 350-358. doi: 10.13700/j.bh.1001-5965.2019.0260
引用本文: 宣传伟, 韩景龙. 重叠网格中隐式装配策略的改进[J]. 北京航空航天大学学报, 2020, 46(2): 350-358. doi: 10.13700/j.bh.1001-5965.2019.0260
XUAN Chuanwei, HAN Jinglong. Enhancement of implicit assembly strategy in overlapping grids[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 350-358. doi: 10.13700/j.bh.1001-5965.2019.0260(in Chinese)
Citation: XUAN Chuanwei, HAN Jinglong. Enhancement of implicit assembly strategy in overlapping grids[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 350-358. doi: 10.13700/j.bh.1001-5965.2019.0260(in Chinese)

重叠网格中隐式装配策略的改进

doi: 10.13700/j.bh.1001-5965.2019.0260
基金项目: 

国家自然科学基金 11472133

江苏高校优势学科建设工程 

详细信息
    作者简介:

    宣传伟  男, 博士研究生。主要研究方向:气动弹性力学

    韩景龙  男, 博士, 教授, 博士生导师。主要研究方向:气动弹性力学

    通讯作者:

    韩景龙, E-mail: hjlae@nuaa.edu.cn

  • 中图分类号: V211.3

Enhancement of implicit assembly strategy in overlapping grids

Funds: 

National Natural Science Foundation of China 11472133

Priority Academic Program Development of Jiangsu Higher Eduction Institutions 

More Information
  • 摘要:

    作为重叠网格技术的重要组成部分,隐式装配没有显式的“挖洞”过程,仅需在搜索贡献单元的同时通过对比不同单元的品质来分类单元。通过对传统隐式装配过程进行改进,提出了一种更高效的隐式装配策略,减少了贡献单元的搜索次数;同时,提出了一种基于笛卡儿网格映射的局部贡献单元搜索法,提高了网格装配效率。首先,针对每一个子网格,在计算其到自身物面的最短物面距离的同时也计算到其他所有物面的最短物面距离;然后,通过比较同一单元到不同物面的最短物面距离来控制洞边界的位置;最后,仅对插值单元进行局部的贡献单元搜索,避免了针对所有单元进行全局贡献单元搜索的过程。通过3个典型复杂流动算例验证了所提方法的准确性与高效性。

     

  • 图 1  隐式挖洞

    Figure 1.  Implicit holecutting

    图 2  洞边界

    Figure 2.  Hole boundary

    图 3  判断单元是否位于物面内部

    Figure 3.  Determine whether a cell is inside wall surface

    图 4  重叠网格系统

    Figure 4.  Overlapping grid system

    图 5  重叠网格系统的物面距离云图

    Figure 5.  Wall surface distance contour of overlapping grid system

    图 6  挖洞后网格

    Figure 6.  Grids after hole cutting

    图 7  基于笛卡儿网格映射的局部贡献单元搜索

    Figure 7.  Local donor cell search based on Cartesian grid mapping

    图 8  30P30N三段式机翼重叠网格效果图

    Figure 8.  Overlapping grid of 30P30N wing

    图 9  30P30N翼面压力云图

    Figure 9.  Pressure contour of 30P30N wing

    图 10  30P30N翼面压力系数对比

    Figure 10.  Comparison of pressure coefficients of 30P30N wing

    图 11  Titan Ⅳ运载火箭重叠网格系统

    Figure 11.  Overlapping grid system for Titan Ⅳ launch vehicle

    图 12  TitanⅣ运载火箭挖洞效果

    Figure 12.  Hole cutting effect of Titan Ⅳ launch vehicle

    图 13  Titan Ⅳ运载火箭对称面流场速度云图

    Figure 13.  Velocity contour of symmetry plane flow of Titan Ⅳ launch vehicle

    图 14  芯级中心线压力分布

    Figure 14.  Pressure distribution along rocket center line

    图 15  机翼挂载重叠网格系统

    Figure 15.  Overlapping grid system of wing store

    图 16  机翼挂载分离挖洞效果

    Figure 16.  Hole cutting effect of wing store separation

    图 17  挂载物下落过程

    Figure 17.  Falling of store

    图 18  机翼挂载分离过程计算结果与实验结果对比

    Figure 18.  Comparison of calculation and experiment resultsof wing store separation process

    表  1  不同策略的网格装配时间比较

    Table  1.   Grid assembly time comparison of different strategies

    策略 网格装配时间/s
    30P30N三段式机翼 Titan Ⅳ运载火箭 机翼挂载分离
    本文策略 2.88 28.54 9 072.34
    文献[35]策略 4.03 40.56 13 670.35
    文献[26]策略 4.55 51.32 16 405.69
    传统策略 5.38 72.66 27 702.00
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-05-28
  • 录用日期:  2019-07-19
  • 刊出日期:  2020-02-20

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