DOI QR코드

DOI QR Code

Flow-induced interior noise from a turbulent boundary layer of a towed body

  • Abshagen, J. (Research Department for Underwater Acoustics and Marine Geophysics (FWG), Bundeswehr Technical Centre) ;
  • Kuter, D. (Research Department for Underwater Acoustics and Marine Geophysics (FWG), Bundeswehr Technical Centre) ;
  • Nejedl, V. (Research Department for Underwater Acoustics and Marine Geophysics (FWG), Bundeswehr Technical Centre)
  • Received : 2015.05.30
  • Accepted : 2015.10.03
  • Published : 2016.07.25

Abstract

In this work results from an underwater experiment on flow-induced noise in the interior of a towed body generated from a surrounding turbulent boundary layer are presented. The measurements were performed with a towed body under open sea conditions at towing depths below 100 m and towing speeds ranging from 2.4 m/s to 6.2 m/s (4 kn to 12 kn). Focus is given in the experiments to the relation between (outer) wall pressure fluctuations and the (inner) hydroacoustic near-field on the reverse side of a flat plate. The plate configuration consists of a sandwich structure with an (thick) outer polyurethane layer supported by an inner thin layer from fibre-reinforced plastics. Parameters of the turbulent boundary layer are estimated in order to analyse scaling relations of wall-pressure fluctuations, interior hydroacoustic noise, and the reduction of pressure fluctuations through the plate.

Keywords

References

  1. Abshagen, J. and Nejedl, V. (2014), "Towed body measurements of flow noise from a turbulent boundary layer under sea conditions", J. Acoust. Soc. Am., 135, 637-645. https://doi.org/10.1121/1.4861238
  2. Abshagen, J., Schafer, I., Will, Ch. and Pfister, G. (2015), "Coherent flow noise beneath a flat plate in a water tunnel experiment", J. Sound Vib., 340 211-220. https://doi.org/10.1016/j.jsv.2014.11.033
  3. Blake, W.K. (1986), Mechanics of flow-induced sound and vibration, Academic Press, New York.
  4. Camussi, R. (2013), Noise sources in turbulent shear flow: fundamentals and applications, CISM Courses and Lectures, Springer, Wien.
  5. Carey, W.M. and Evans, R.B. (2011), Ocean Ambient Noise: Measurement and Theory, Springer, New York.
  6. Cebeci, T. and Cousteix, J. (1999), Modeling and computation of boundary-layer flows, Horizons Publishing Inc., Long Beach, CA.
  7. Ciappi, E., De Rosa, S., Franco, F., Guyader J.L. and Hambric, S.A. (2015), Flinovia-Flow Induced Noise and Vibration Issues and Aspects, Springer, Cham.
  8. Ciappi, E., Magionesi, F., De Rosa, S. and Franco, F. (2013), "Analysis of the scaling laws for the turbulence driven panel responses", J. Fluid. Struct., 32, 90-103.
  9. Corcos, G.M. (1963), "Resolution of pressure in turbulence", J. Acoust. Soc. Am., 35, 192-199. https://doi.org/10.1121/1.1918431
  10. De Rosa, S. and Franco, F. (2008), "Exact and numerical response of a plate under turbulent boundary layer excitation", J. Fluid. Struct., 24, 212-230. https://doi.org/10.1016/j.jfluidstructs.2007.07.007
  11. Dowling, A.P. (1998), "Underwater f1ow noise", Theor. Comput. Fluid Dyn., 10, 135-153. https://doi.org/10.1007/s001620050055
  12. Elboth, T., Reif, B.A., Andreassen, O. and Martell, M.B. (2012), "Flow noise reduction from superhydrophobic surfaces", Geophys., 77, P1 -P10.
  13. Farabee, T.M. and Casarella, M.J. (1991), "Spectral features of wall pressure fluctuations beneath turbulent boundary layers", Phys. Fluid. A, 10, 2410-2420.
  14. Galib, T.A., Katz, R.A., Ko, S.H. and Sandman, B. (1994), "Measurements of turbulent pressure fluctuations using a buoyant vehicle coated with a thin elastomer layer", J. Acoust. Soc. Am., 96, 3800-3803. https://doi.org/10.1121/1.410569
  15. Hambric, S.A., Hwang, Y.F. and Bonness, W.K. (2004), "Vibration of plates with clamped and free edges excited by low-speed turbulent boundary layer", J. Fluid. Struct., 19, 93-110. https://doi.org/10.1016/j.jfluidstructs.2003.09.002
  16. Hu, N., Buchholz, H., Herr, M., Spehr, C. and Haxter, S. (2013) "Contribution of different aeroacoustic sources to aircraft cabin noise", 19th AIAA/CEAS Conference, DOI: 10.2514/6.2013-2030.
  17. Keith, W.L, Cipolla, K.M. and Furey, D. (2009), "Turbulent wall pressure fluctuation measurements on a towed model at high Reynolds numbers", Exp. Fluid., 46, 181-189. https://doi.org/10.1007/s00348-008-0552-y
  18. Lueptow, R.M. (1995), "Transducer resolution and the turbulent wall pressure spectrum", J. Acoust. Soc. Am., 97, 370-378. https://doi.org/10.1121/1.412322
  19. Muller, S., Becker, S., Gabriel, Ch., Lerch, R. and Ulrich, F. (2013), "Flow-induced input of sound to the interior of a simplified car model depending on various setup parameters", 19th AIAA/CEAS Conference, DOI: 10.2514/6.2013-2019.
  20. Nishi, R.Y., Stockhausen, J.H. and Evensen, E. (1969), "Measurements of noise on an underwater towed body", J. Acoust. Soc. Am., 48, 753-758.
  21. Orrenius, U., Cotoni, V. and Wareing, A. (2009), "Analysis of sound transmission through aircraft fuselages excited turbulent boundary layer or diffusive acoustic pressure fields", Proc. 38th InterNoise Congress, Ottawa, Canada, August.
  22. Schlichting, H. (1965), Grenzschicht-Theorie (Boundary Layer Theory), G. Braun, Karlsruhe.
  23. Urick, R.J. (1975), Principles of Underwater Sound, 2nd Edition, McGraw-Hill, New York.
  24. Willmarth, W.W. (1975), "Pressure fluctuations beneath turbulent boundary layers", Annu. Rev. Fluid Mech., 7, 13-38. https://doi.org/10.1146/annurev.fl.07.010175.000305

Cited by

  1. Flow noise in planar sonar applications vol.78, 2018, https://doi.org/10.1016/j.jfluidstructs.2018.01.007
  2. A Flow Velocity Measurement Method Based on a PVDF Piezoelectric Sensor vol.19, pp.7, 2019, https://doi.org/10.3390/s19071657
  3. Inclination angle influence on noise of cavitating marine propeller vol.10, pp.1, 2020, https://doi.org/10.12989/ose.2020.10.1.049