中国物理B ›› 2015, Vol. 24 ›› Issue (6): 64702-064702.doi: 10.1088/1674-1056/24/6/064702

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer

郑小波a, 姜楠a b c   

  1. a Department of Mechanics, Tianjin University, Tianjin 300072, China;
    b Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China;
    c The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2014-09-22 修回日期:2014-11-27 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant Nos. 2012CB720101 and 2012CB720103) and the National Natural Science Foundation of China (Grant Nos. 11272233, 11332006, and 11411130150).

Experimental study on spectrum and multi-scale nature of wall pressure and velocity in turbulent boundary layer

Zheng Xiao-Bo (郑小波)a, Jiang Nan (姜楠)a b c   

  1. a Department of Mechanics, Tianjin University, Tianjin 300072, China;
    b Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China;
    c The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-09-22 Revised:2014-11-27 Online:2015-06-05 Published:2015-06-05
  • Contact: Jiang Nan E-mail:nanj@tju.edu.cn
  • About author:47.27.De; 47.27.nb; 47.27.Rc
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant Nos. 2012CB720101 and 2012CB720103) and the National Natural Science Foundation of China (Grant Nos. 11272233, 11332006, and 11411130150).

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摘要： When using a miniature single sensor boundary layer probe, the time sequences of the stream-wise velocity in the turbulent boundary layer (TBL) are measured by using a hot wire anemometer. Beneath the fully developed TBL, the wall pressure fluctuations are attained by a microphone mechanism with high spatial resolution. Analysis on the statistic and spectrum properties of velocity and wall pressure reveals the relationship between the wall pressure fluctuation and the energy-containing structure in the buffer layer of the TBL. Wavelet transform shows the multi-scale natures of coherent structures contained in both signals of velocity and pressure. The most intermittent wall pressure scale is associated with the coherent structure in the buffer layer. Meanwhile the most energetic scale of velocity fluctuation at y+= 14 provides a specific frequency f9 ≈ 147 Hz for wall actuating control with Reτ= 996.

关键词: multi-scale coherent structures, hot wire anemometry, microphone, wavelet transform

Abstract: When using a miniature single sensor boundary layer probe, the time sequences of the stream-wise velocity in the turbulent boundary layer (TBL) are measured by using a hot wire anemometer. Beneath the fully developed TBL, the wall pressure fluctuations are attained by a microphone mechanism with high spatial resolution. Analysis on the statistic and spectrum properties of velocity and wall pressure reveals the relationship between the wall pressure fluctuation and the energy-containing structure in the buffer layer of the TBL. Wavelet transform shows the multi-scale natures of coherent structures contained in both signals of velocity and pressure. The most intermittent wall pressure scale is associated with the coherent structure in the buffer layer. Meanwhile the most energetic scale of velocity fluctuation at y+= 14 provides a specific frequency f9 ≈ 147 Hz for wall actuating control with Reτ= 996.

Key words: multi-scale coherent structures, hot wire anemometry, microphone, wavelet transform

中图分类号:  (Coherent structures)

  • 47.27.De
47.27.nb (Boundary layer turbulence ?) 47.27.Rc (Turbulence control)