Applied Mathematics and Mechanics (English Edition) ›› 2019, Vol. 40 ›› Issue (3): 407-420.doi: https://doi.org/10.1007/s10483-019-2450-6

• 论文 • 上一篇    

Linear stability theory with the equivalent spanwise wavenumber correction in 3D boundary layers

Runjie SONG1, Shaolong ZHANG2, Jianxin LIU1   

  1. 1. Laboratory for High-Speed Aerodynamics, Tianjin University, Tianjin 300072, China;
    2. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China
  • 收稿日期:2018-09-05 修回日期:2018-12-13 出版日期:2019-03-01 发布日期:2019-03-01
  • 通讯作者: Jianxin LIU E-mail:shookware@tju.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development (R & D) Program of China (No. 2016YFA0401200) and the National Natural Science Foundation of China (Nos. 11402167, 11332007, 11672204, 11672205, and 11732011)

Linear stability theory with the equivalent spanwise wavenumber correction in 3D boundary layers

Runjie SONG1, Shaolong ZHANG2, Jianxin LIU1   

  1. 1. Laboratory for High-Speed Aerodynamics, Tianjin University, Tianjin 300072, China;
    2. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China
  • Received:2018-09-05 Revised:2018-12-13 Online:2019-03-01 Published:2019-03-01
  • Contact: Jianxin LIU E-mail:shookware@tju.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development (R & D) Program of China (No. 2016YFA0401200) and the National Natural Science Foundation of China (Nos. 11402167, 11332007, 11672204, 11672205, and 11732011)

摘要: The prediction on small disturbance propagation in complex three-dimensional (3D) boundary layers is of great significance in transition prediction methodology, especially in the aircraft design. In this paper, the linear stability theory (LST) with the equivalent spanwise wavenumber correction (ESWC) is proposed in order to accurately predict the linear evolution of a disturbance in a kind of boundary layer flow with a vital variation in the spanwise direction. The LST with the ESWC takes not only the scale of the mean flow with the significant variation but also the wavenumber evolution of the disturbance itself. Compared with the conventional LST, the results obtained by the new method are in excellent agreement with those of the numerical simulations. The LST with the ESWC is an effective method on the prediction of the disturbance evolution in 3D boundary layers, which improves the prediction of the LST in the applications to complex 3D boundary layers greatly.

关键词: dynamic plastic buckling, energy criterion, rigid plastic material, cylindrical shell, prediction of disturbance propagation, numerical simulation, three-dimensional (3D) boundary layer, linear stability theory (LST), equivalent spanwise wavenumber

Abstract: The prediction on small disturbance propagation in complex three-dimensional (3D) boundary layers is of great significance in transition prediction methodology, especially in the aircraft design. In this paper, the linear stability theory (LST) with the equivalent spanwise wavenumber correction (ESWC) is proposed in order to accurately predict the linear evolution of a disturbance in a kind of boundary layer flow with a vital variation in the spanwise direction. The LST with the ESWC takes not only the scale of the mean flow with the significant variation but also the wavenumber evolution of the disturbance itself. Compared with the conventional LST, the results obtained by the new method are in excellent agreement with those of the numerical simulations. The LST with the ESWC is an effective method on the prediction of the disturbance evolution in 3D boundary layers, which improves the prediction of the LST in the applications to complex 3D boundary layers greatly.

Key words: dynamic plastic buckling, energy criterion, rigid plastic material, cylindrical shell, linear stability theory (LST), equivalent spanwise wavenumber, numerical simulation, three-dimensional (3D) boundary layer, prediction of disturbance propagation

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