Applied Mathematics and Mechanics (English Edition) ›› 2016, Vol. 37 ›› Issue (10): 1289-1304.doi: https://doi.org/10.1007/s10483-016-2132-9

• 论文 • 上一篇    下一篇

Large eddy simulation of aircraft wake vortex with self-adaptive grid method

Mengda LIN, Guixiang CUI, Zhaoshun ZHANG   

  1. Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100010, China
  • 收稿日期:2016-01-04 修回日期:2016-04-11 出版日期:2016-10-01 发布日期:2016-10-01
  • 通讯作者: Guixiang CUI E-mail:cgx@tsinghua.edu.cn
  • 基金资助:

    Project supported by the Boeing-COMAC Aviation Energy Conservation and Emissions Reduction Technology Center (AECER)

Large eddy simulation of aircraft wake vortex with self-adaptive grid method

Mengda LIN, Guixiang CUI, Zhaoshun ZHANG   

  1. Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100010, China
  • Received:2016-01-04 Revised:2016-04-11 Online:2016-10-01 Published:2016-10-01
  • Supported by:

    Project supported by the Boeing-COMAC Aviation Energy Conservation and Emissions Reduction Technology Center (AECER)

摘要:

A self-adaptive-grid method is applied to numerical simulation of the evolution of aircraft wake vortex with the large eddy simulation (LES). The Idaho Falls (IDF) measurement of run 9 case is simulated numerically and compared with that of the field experimental data. The comparison shows that the method is reliable in the complex atmospheric environment with crosswind and ground effect. In addition, six cases with different ambient atmospheric turbulences and Brunt Väisälä (BV) frequencies are computed with the LES. The main characteristics of vortex are appropriately simulated by the current method. The onset time of rapid decay and the descending of vortices are in agreement with the previous measurements and the numerical prediction. Also, secondary structures such as baroclinic vorticity and helical structures are also simulated. Only approximately 6 million grid points are needed in computation with the present method, while the number can be as large as 34 million when using a uniform mesh with the same core resolution. The self-adaptive-grid method is proved to be practical in the numerical research of aircraft wake vortex.

关键词: large eddy simulation (LES), self-adaptive grid, aircraft wake vortex

Abstract:

A self-adaptive-grid method is applied to numerical simulation of the evolution of aircraft wake vortex with the large eddy simulation (LES). The Idaho Falls (IDF) measurement of run 9 case is simulated numerically and compared with that of the field experimental data. The comparison shows that the method is reliable in the complex atmospheric environment with crosswind and ground effect. In addition, six cases with different ambient atmospheric turbulences and Brunt Väisälä (BV) frequencies are computed with the LES. The main characteristics of vortex are appropriately simulated by the current method. The onset time of rapid decay and the descending of vortices are in agreement with the previous measurements and the numerical prediction. Also, secondary structures such as baroclinic vorticity and helical structures are also simulated. Only approximately 6 million grid points are needed in computation with the present method, while the number can be as large as 34 million when using a uniform mesh with the same core resolution. The self-adaptive-grid method is proved to be practical in the numerical research of aircraft wake vortex.

Key words: self-adaptive grid, large eddy simulation (LES), aircraft wake vortex

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