Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

A study on the improvement of cavitation inception speed for controllable pitch propeller in the actual warship

실선관측에 의한 가변추진기의 캐비테이션 초생속도 향상에 관한 연구

  • Lim, Yong-Su (2nd Busan Team, Defense Agency for Technology and Quality) ;
  • Jo, Kwan-Jun (2nd Busan Team, Defense Agency for Technology and Quality) ;
  • Yeun, Je-Gil (Defense Acquisition Program Administration)
  • Received : 2014.07.01
  • Accepted : 2014.10.14
  • Published : 2014.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

If cavitation occurs in propeller, it generates vibration and noise accordingly which results in low efficiency of propeller. It's important to increase cavitation inception speed(CIS) since the noise of cavitation increases significantly from the beginning of cavitation. This paper describes the result of actual observation and measurement onboard ship with controllable pitch propeller(CPP), so as to verify the first occurrence phenomenon of cavitation. The research suggests new type of controllable pitch propeller with improved CIS at the bolt as it started with bolt cavitation as result of observation. It's not found bolt cavitation on the CPP proposed in this paper, furthermore its CIS is increased approximately by 4.5 knots than the existing CPP. The result of the research can be used for development of low-noise CPP and improving performance of CIS.

추진기에서 캐비테이션이 발생되면 효율이 저하되고 진동과 소음이 발생한다. 소음은 캐비테이션이 처음으로 발생되는 시점부터 크게 증가되므로 캐비테이션 초생속도(CIS)를 가능한 높이는 것이 중요하다. 본 논문에서는 가변추진기의 캐비테이션 초기발생 현상을 확인하기 위하여 처음으로 캐비테이션 실선관측을 수행하였다. 관측 결과 가변추진에서 캐비테이션 초기발생은 볼트 캐비테이션으로 확인되어 볼트부위를 개선한 새로운 형상의 가변추진기를 제안하였다. 개선된 가변추진기에서는 볼트 캐비테이션이 전혀 발생되지 않았으며, CIS는 개선 전 가변추진기 보다 약 4.5 노트 향상된 것을 확인하였다. 본 연구 결과는 향후 저소음 가변추진기 개발과 CIS 성능 향상에 매우 유용한 자료로 활용될 것이다.

Keywords

References

  1. Y. I. Jeon, S. I. Park, W. C. Seok, and J. C Seo, "A study on the observation method of propeller cavitation," Proceeding of the annual autumn meeting, The society of naval architects of Korea, Mokpo, pp. 388-393, 2011 (in Korean).
  2. P. H. Lee, B. K. Ahn, C. S. Lee, and J. H. Lee, "An experimental study on noise characteristics of propeller cavitation inception," Journal of the society of naval architects of Korea, vol. 48, no. 1, pp. 1-7, 2011. https://doi.org/10.3744/SNAK.2011.48.1.1
  3. C. S. Lee, J. C. Seo, B. S. Hyeon, M. C. Kim, S. B. Seo, and I. S. Mun, "Marine propulsion and propeller design," Seoul, Korea : Munundang, pp. 237-239, 2012 (in Korean).
  4. K. S. Kim, "Naval ship propeller cavitation occurrence characteristics and cavitation functional qualification test performed by MOERI LCT," Proceeding of the 16th Naval Ship Technology & Weapon System Seminar, p. 195, 2013.
  5. I. H. Song, J. W. Ahn, K. S. Kim, and I. S. Moon, "Characteristics of cavitation noise on high speed propellers," Journal of the society of naval architects of Korea, vol. 37, no. 2, p. 25, 2000.
  6. Y. S. Na, "A study on the improvement of cavitation inception speed for naval propellers," Ph.D. Dissertation, Department of naval architecture and ocean engineering, Chungnam National University, Korea, pp. 58-62, 2005.
  7. J. T. Lee, "Performance analysis method of propeller cavitation," Journal of the Society of Naval Architects of Korea, vol. 31, no. 4, pp. 11-12, 1994 (in Korean).

Cited by

  1. Numerical Investigation of Tip Vortex Cavitation Inception and Noise of Underwater Propellers of Submarine Using Sequential Eulerian-Lagrangian Approaches vol.10, pp.23, 2014, https://doi.org/10.3390/app10238721