Advances in aircraft and spacecraft science

  • 제3권3호
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  • Pages.259-269
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  • 2016
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  • 2287-528X(pISSN)
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  • 2287-5271(eISSN)
테크노프레스 (Techno-Press)
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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)
  • 투고 : 2015.05.30
  • 심사 : 2015.10.03
  • 발행 : 2016.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

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  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