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

The Society of Naval Architects of Korea (대한조선학회)
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Experimental Study of the Flat & Twisted Rudder Characteristics Using Rudder Dynamometer in LCT

LCT에서 방향타 동력계를 이용한 평판 및 비틀림 방향타 특성의 실험적 연구

  • Ahn, Jong-Woo (Korea Research Institute of Ships & Ocean Engineering) ;
  • Paik, Bu-Geun (Korea Research Institute of Ships & Ocean Engineering) ;
  • Park, Young-Ha (Korea Research Institute of Ships & Ocean Engineering) ;
  • Seol, Han-Shin (Korea Research Institute of Ships & Ocean Engineering)
  • 안종우 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 백부근 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박영하 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 설한신 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2021.09.06
  • Accepted : 2021.10.19
  • Published : 2021.12.20
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Abstract

In order to investigate force and cavitation characteristics for the flat & twisted rudders in the Large Cavitation Tunnel (LCT), the rudder dynamometer was designed and manufactured. The measuring capacities of lift, drag and moment are ±1000 N, ±2000 N, and ±150 N-m, respectively. The present dynamometer uses the actuator with a harmonic drive to control the rudder angle without backlash. As the target ship is a military ship with twin shaft, each dynamometer was installed above the port & starboard rudders. After the installation of the model ship with all appendages, the model test composed of rudder force measurement and cavitation observation was conducted for the existing flat rudder & the designed twisted rudder. While the flat rudder showed the big difference of lift & moment between port & starboard, the twisted rudder presented a similar trend. The cavitation of the twisted rudder showed better characteristics than that of the flat rudder. Another set of model tests were conducted to investigate rudder performance by the change of the design propeller. There was little difference in rudder performance for the design propellers with slight geometric change. Through the model test, the characteristics of the flat & twisted rudders were grasped. On the basis of the present study, it is thought that the rudder with better performance would be developed.

Keywords

Acknowledgement

본 연구는 산업통상자원부와 방위사업청이 지원하는 민군기술협력사업 민군기술개발과제 '3차원 곡면형 비틀림 방향타 기술' 과제(PNS3840)의 지원으로 수행되었으며 이에 감사 드립니다.

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