The EFD and CFD study of rudder-bulb-fin system in ship and propeller wake field of KVLCC2 tanker in calm water

Tho Quang Truong, Ping Chen Wu, Kaoru Aoyagi, Kenta Koike, Yu Akiyama, Yasuyuki Toda

研究成果: Conference contribution

3 引文 斯高帕斯(Scopus)

摘要

Developing the high efficiency ships is one of the goals that we are heading. The present work is to study the energy saving device, which is a rudder-bulb-fin system, designed for the KVLCC2 tanker. The horizontal fins on the both sides of the rudder bulb share the same foil section, but the suction side faces up on the portside and faces down on the starboard side. The concept is to recover or reduce the energy loss, or gain extra thrust in the propeller rotational flow. The viscous flow simulation was performed by CFDSHIP-Iowa V4.5 with a propeller model. The test condition is at design Froude number 0.142 in calm water for a 3.2m long ship model. The force and flow field were measured in Osaka University towing tank. The propeller rotational rate was determined in EFD (Experimental Fluid Dynamic) self-propulsion test. EFD and CFD (Computational Fluid Dynamic) showed good agreement for rudder flow field and forces for zero degree AOA (angle of attack) for both fins. Furthermore, the AOA combinations from 1 to -2 degree with 1-degree increment for both fins were investigated by CFD only. The best energy saving effect AOA was found; 0 degree for portside fin and -1 degree for starboard side fin. The total resistance was reduced by 2.3% compared with the normal rudder case. Among the cases, its thrust deduction, effective wake and hull efficiency factor were the optimal values.

原文English
主出版物標題Proceedings of the 27th International Ocean and Polar Engineering Conference, ISOPE 2017
發行者Society of Petroleum Engineers
頁面823-830
頁數8
ISBN(電子)9781880653975
出版狀態Published - 2017
事件27th International Ocean and Polar Engineering Conference, ISOPE 2017 - San Francisco, United States
持續時間: 2017 六月 252017 六月 30

出版系列

名字Proceedings of the International Offshore and Polar Engineering Conference
ISSN(列印)1098-6189
ISSN(電子)1555-1792

Other

Other27th International Ocean and Polar Engineering Conference, ISOPE 2017
國家/地區United States
城市San Francisco
期間17-06-2517-06-30

All Science Journal Classification (ASJC) codes

  • 能源工程與電力技術
  • 海洋工程
  • 機械工業

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