LYU S J, GAO Y, LIU J, et al. Application analysis on the wavenumber-frequency spectrum of pressure excited by a turbulent boundary layer on the wall of an underwater test vehicle[J]. Chinese Journal of Ship Research, 2020, 15(Supp 1): 55–60. doi: 10.19693/j.issn.1673-3185.01581
Citation: LYU S J, GAO Y, LIU J, et al. Application analysis on the wavenumber-frequency spectrum of pressure excited by a turbulent boundary layer on the wall of an underwater test vehicle[J]. Chinese Journal of Ship Research, 2020, 15(Supp 1): 55–60. doi: 10.19693/j.issn.1673-3185.01581

Application analysis on the wavenumber-frequency spectrum of pressure excited by a turbulent boundary layer on the wall of an underwater test vehicle

  •   Objectives  This paper analyzes the application of sound radiation by fluid-exciting force in correlation with the measurements of different models.
      Methods  The wavenumber-frequency spectrum of turbulent pressure fluctuations is exploited to calculate fluid-exciting sound radiation of plate model. Thereby, we propose a test method of applying wavenumber-frequency spectrum of turbulent pressure fluctuations to the underwater vehicle, and comparing the differences in measurements with the classic model.
      Results  The results show that, the measurements of the wavenumber-frequency spectrum of turbulent pressure fluctuations of the plate model are relatively consistent with those of the classic model, with a deviation of less than 3 dB. In the band above ring frequency, the model of revolution body can be approximated as plate model, the measurement of wavenumber-frequency spectrum of turbulent pressure fluctuations varies slightly in contrast to the plate model, with a deviation of less than 3 dB. In the band below ring frequency, if test data of excitation force obtained by the plate model are used to calculate the fluid-exciting sound radiation, it will yield a higher deviation.
      Conclusions  The experiment and analysis results provide a theoretic foundation to use the test data of pressure excited by a turbulent boundary layer on the wall of underwater vehicle.
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