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

  • 제46권5호
  • /
  • Pages.460-470
  • /
  • 2009
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  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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차단 봉이 혼과 타판 사이에 대칭으로 배치된 타의 틈새유동 수치해석

Numerical Study on the Gap Flow of a Rudder System with Bisymmetric Blocking Bar

  • 오정근 (인하대학교 정석물류통상연구원) ;
  • 서대원 (인하대학교 선박공학과) ;
  • 김효철 (인하대학교 정석물류통상연구원)
  • Oh, Jung-Keun (Jungseok Research Institute of International Logistics and Trade, Inha University) ;
  • Seo, Dae-Won (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Kim, Hyo-Chul (Jungseok Research Institute of International Logistics and Trade, Inha University)
  • 발행 : 2009.10.20
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초록

In recent practice a half round prismatic bar has fillet welded or formed through foundry work along the centerline on rear concave surface of the horn to mitigate gap flow between fixed and movable part of the rudder system. When the gap clearance has been blocked with this practice, numerical simulations indicate that the practices are not only effective in reducing the gap flow but also in mitigating the cavitation. The blocking effects are remarkably improved when a pair of blocking bar is bisymmetrically attached with respect to centerline on the opposite convex surface of the movable part. The blocking bar could be placed on the exposed surface under maximum rudder angle. This implies that the blocking bar could be easily adopted not only in a design stage but also in a maintenance stage for mitigating rudder cavitation. In addition, the numerical simulations imply that more improvements could be anticipated through the selection of section shape of prismatic bar for gap flow blocking.

키워드

참고문헌

  1. Boo, K.T., Han, J.M., Song, I.H., and Shin, S.C., 2003, “Viscous Flow Analysis for the Rudder Section Using FLUENT Code,” Journal of the Society of Naval Architects of Korea, Vol. 40, No. 4, pp. 30-36. https://doi.org/10.3744/SNAK.2003.40.4.030
  2. Boo, K.T., Song, I.H. and Shin, S.C., 2004, "Numerical Simulation for the Rudder in order to Control the Cavitation Phenomena," Journal of Ship and Ocean Technology, Vol. 8, No. 1, pp. 42-50.
  3. Choi, J.E., Chung, S.H., and Kim, J.H., 2007, “Cavitating-Flow Characteristics around a Horn-Type Rudder,” Journal of the Society of Naval Architects of Korea, Vol. 44, No. 3, pp. 228-237. https://doi.org/10.3744/SNAK.2007.44.3.228
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  5. Kim, M.C., Lee, U.S., and Byun, T.Y., 2008, “Study on Optimization of Anti-erosion Rudder Section of Large Container Ship by Genetic Algorithm,” Journal of the Society of Naval Architects of Korea, Vol. 45, No. 4, pp. 403-410. https://doi.org/10.3744/SNAK.2008.45.4.403
  6. Kim, S.P., Park, J.J., Kim, Y.S., Jang, Y.H., Choi, Y.B., and Paik, B.G., 2006b, “An Experimental Research on Gap Cavitation Erosion of Semi-spade Rudder,” Journal of the Society of Naval Architects of Korea, Vol. 43, No. 5, pp. 578-585. https://doi.org/10.3744/SNAK.2006.43.5.578
  7. Oh, J.K., Lee, C.M., Lee, H.B., Seo, D.W., Rhee, S.H., Suh, J.C., Lee, S.H., and Kim, H, 2008, “RUDDER GAP CAVITATION AND ITS SUPPRESSION DEVICES," Proceedings of FEDSM2008 (2008 ASME Fluids Engineering Conference), Aug. 10-14, Jacksonville, Florida, USA.
  8. Paik, B.G., Kim, K.Y., Ahn, J.W., Park, S.H., Heo, J.K., and Yu, B.S., 2008, “Cavitation Observation and Visualization of the Gap Flows on a Rudder Influenced by Propeller Slipstream and Hull Wakes,” Journal of the Society of Naval Architects of Korea, Vol. 45, No. 3, pp. 238-246. https://doi.org/10.3744/SNAK.2008.45.3.238
  9. Rhee, S.H., Oh, J.K., Suh, J.C., Lew, J.M., and Kim, H., 2006, “Application of Gap Flow Control Device to Avoid the Rudder Cavitation,” Proceedings of the Annual Spring Meeting, The Society of Naval Architects of Korea, pp. 78-84.

피인용 문헌

  1. Practically applicable devices for blocking the gap flow of a horn rudder to reduce rudder cavitation and their verification through numerical simulations vol.17, pp.1, 2012, https://doi.org/10.1007/s00773-011-0149-7