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

The Society of Naval Architects of Korea (대한조선학회)
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Study of the Open-Water Test and Analysis for a Pumpjet Propulsor in LCT

대형 캐비테이션터널에서 펌프젯 추진기 단독성능 시험 및 해석 기법 연구

  • Ahn, Jong-Woo (Korea Research Institute of Ships & Ocean Engineering) ;
  • Seol, Han-Shin (Korea Research Institute of Ships & Ocean Engineering) ;
  • Jung, Hong-Seok (Korea Research Institute of Ships & Ocean Engineering) ;
  • Park, Young-Ha (Korea Research Institute of Ships & Ocean Engineering)
  • 안종우 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 설한신 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정홍석 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박영하 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2022.01.28
  • Accepted : 2022.03.15
  • Published : 2022.06.20
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Abstract

In order to study the open-water test and analysis techniques for pumpjet propulsors in the Large Cavitation Tunnel (LCT), at the Korea Research Institute of Ships and Ocean Engineering, a set of test equipment was designed and manufactured. The pumpjet propulsor is composed of rotor, stator and duct resulting in the strong interaction between the components. A ring-shaped sensor was developed to measure the thrust and torque for duct and stator. The test equipment including the pumpjet is installed on an existing POW dynamometer in the reverse direction. The results from the reverse POW test setup were validated against those from the conventional POW test setup in the Towing Tank (TT) as well as in the LCT. The pumpjet open-water test was conducted at the Reynolds number of around 1.0×106, at which the obtained experimental data became stable in the Reynolds number effect test. The open-water test for the rotor (rotor-only) was conducted to study whether the duct and stator should be considered as a part of the hull or the propulsor. On the basis of the test results, it was shown that the duct and stator could be included in the propulsor. The total thrust, combined thrust of rotor, duct, and stator was used for the pumpjet open-water test analysis. As the whole pumpjet is defined as a propulsor, it is thought that the self-propulsion test and analysis could be conducted in the same way as that of the conventional propeller.

Keywords

Acknowledgement

본 연구는 방위사업청과 국방연구소가 지원한 특화연구실 사업 '미래 잠수함 추진기 소음 모형시험법 개발 및 D/B 구축연구' 과제(PGS4262)의 지원으로 수행되었으며 이에 감사드립니다.

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