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

The Society of Naval Architects of Korea (대한조선학회)
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An Experimental Study on Noise Characteristics of Propeller Cavitation Inception

프로펠러 캐비테이션의 초기발생과 소음특성에 대한 실험연구

  • Lee, Phil-Ho (Agency for Defense Development) ;
  • Ahn, Byoung-Kwon (Dept. of Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Lee, Chang-Sup (Dept. of Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Lee, Jung-Hoon (Samsung Heavy Industry Co. Ltd., Marine Research Institute)
  • 이필호 (국방과학연구소) ;
  • 안병권 (충남대학교 선박해양공학과) ;
  • 이창섭 (충남대학교 선박해양공학과) ;
  • 이정훈 ((주) 삼성중공업 조선해양연구소)
  • Received : 2010.06.29
  • Accepted : 2010.10.19
  • Published : 2011.02.20
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Abstract

Cavitation is the formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below its vapor pressure. Various types of cavitations are generated on the propeller blades. As cavity bubbles passing the blade are forced to oscillate in size or shape and come to collapse, they cause very strong local acoustic waves in the fluid and radiate noise. Comparing the Sound Pressure Level(SPL) before and after cavitation, SPL increases 2dB per 1 knot increase in ship speed above the cavitation inception speed(CIS). Consequently, the CIS is an important criteria to design silent propellers. In this work, experimental measurements of radiated noise according to various types of cavitations from the model propeller are carried out in a large cavitation tunnel and their acoustical characteristics are extensively investigated.

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References

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Cited by

  1. A study on the improvement of cavitation inception speed for controllable pitch propeller in the actual warship vol.38, pp.9, 2014, https://doi.org/10.5916/jkosme.2014.38.9.1170