Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on the Model Test for the Twin Propeller Cavitation Noise

쌍축선 추진기 캐비테이션 소음 모형시험 연구

  • Park, Cheolsoo (Korea Research Institute of Ships and Ocean Engineering) ;
  • Kim, Gun-Do (Korea Research Institute of Ships and Ocean Engineering) ;
  • Yim, Geun-Tae (Korea Research Institute of Ships and Ocean Engineering) ;
  • Park, Young-Ha (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jang, Hyun-Gil (Daewoo Shipbuilding & Marine Engineering CO., LTD.) ;
  • Jang, Young Hun (Daewoo Shipbuilding & Marine Engineering CO., LTD.)
  • 박철수 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 김건도 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 임근태 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박영하 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 장현길 (대우조선해양) ;
  • 장영훈 (대우조선해양)
  • Received : 2017.09.27
  • Accepted : 2017.12.06
  • Published : 2018.02.20
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Abstract

The experimental results of the model tests for the twin propeller cavitation noise are presented. The model test was carried out by means of procedure of noise measurement followed by the signal processing and full-scale extrapolation. In order to convert the measured sound pressure level into the sound source level, transfer function measurements for three conditions were performed according to the combination of locations and number of virtual sources. White noise and LFM signal were used as a source signals to examine the influence of the input signal. For the twin propellers, 5 transfer functions were defined and the results were discussed. Cavitation noise measurement tests were performed similarly to the transfer function measurement test. Noise source localization analysis was performed to confirm the test effectiveness. It was confirmed that the source level of the twin propeller can be estimated reliably by using transfer function corrections. Finally, the model test results were converted into full-scale by applying the ITTC '87 model-ship scaling raw, and the validity of the model test was confirmed by comparison with the full-scale measurement result.

Keywords

References

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