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真空 ›› 2022, Vol. 59 ›› Issue (4): 33-40.doi: 10.13385/j.cnki.vacuum.2022.04.07

• 真空获得与设备 • 上一篇    下一篇

稀薄气体过渡流中NS/DSMC耦合计算方法的研究进展

刘万锁, 岳向吉, 蔺增   

  1. 东北大学机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2021-09-13 出版日期:2022-07-25 发布日期:2022-08-09
  • 通讯作者: 蔺增,博导。
  • 作者简介:刘万锁（1989-）,男,辽宁省抚顺市人,博士研究生。

Research Progress of NS/DSMC Coupling Calculation Method in the Transitional Flow of Rarefied Gas

LIU Wan-suo, YUE Xiang-ji, LIN Zeng   

  1. School of Mechanical Engineering and Automation, Northeast University, Shenyang 110819, China
  • Received:2021-09-13 Online:2022-07-25 Published:2022-08-09

摘要： 通过NS和DSMC两种方法的联合计算可以求解过渡流,NS/DSMC耦合方法同时包含NS方法计算效率与DSMC方法的计算精度优势。本文详细介绍了耦合方法发展中关键技术的原理,讨论了耦合方法在空间羽流研究中的应用进展,说明了计算域划分方法的不足。并就临近空间飞行器绕流方面的耦合技术应用进行了分析,提出耦合计算结果与实验结果的误差可能由DSMC统计散射造成,其可以通过累计统计方式消除。此外,还讨论了采用两相流模型的NS/DSMC耦合方法在MEMS领域的应用。最后就耦合方法在真空领域的应用和未来耦合算法的研究方向进行了展望。

关键词: NS/DSMC耦合计算, 过渡流, 真空, 羽流, 临近空间

Abstract: The transition flow is solved by the joint calculation of NS and DSMC methods. The NS/DSMC coupling method has the advantages of the computational efficiency of NS method and the computational accuracy of DSMC method.In this paper, the principle of key technologies in the development of coupling method is introduced in detail, the application progress of coupling method in spatial plume research is discussed, and the shortcomings of computational domain partition method are explained. Then the application of coupling technology in the flow around neighbor spacecraft is analyzed. It is proposed that the error between the coupling calculation and the experimental results may be caused by DSMC statistical scattering, which can be eliminated by cumulative statistics. In addition, the application of NS/DSMC coupling method using two-phase flow model in MEMS field is also discussed. Finally, the application of coupling method in vacuum field and the research direction of coupling algorithm in the future are prospected.

Key words: NS/DSMC coupling calculation, transition flow, vacuum, plume, near space

中图分类号: 

  • O356
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