Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Estimation of a 9.77 G/T Small Fishing Vessel's Operating Performance Depending on Forward Speed Based on 3-DoF Captive Model Tests

9.77톤급 소형어선의 3자유도 구속모형시험을 통한 선속 별 운항성능 추정

  • Dong-Jin Kim (Advanced-Intelligent Ship Research Division, Korea Research Institute of Ships and Ocean Engineering) ;
  • Haeseong Ahn (Advanced-Intelligent Ship Research Division, Korea Research Institute of Ships and Ocean Engineering) ;
  • Kyunghee Cho (Advanced-Intelligent Ship Research Division, Korea Research Institute of Ships and Ocean Engineering) ;
  • Dong Jin Yeo (Advanced-Intelligent Ship Research Division, Korea Research Institute of Ships and Ocean Engineering)
  • 김동진 (선박해양플랜트연구소 지능형선박연구본부) ;
  • 안해성 (선박해양플랜트연구소 지능형선박연구본부) ;
  • 조경희 (선박해양플랜트연구소 지능형선박연구본부) ;
  • 여동진 (선박해양플랜트연구소 지능형선박연구본부)
  • Received : 2023.10.13
  • Accepted : 2023.12.08
  • Published : 2023.12.31
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Abstract

In this study, a mathematical model of a 9.77 G/T small fishing vessel was established based on captive model tests. The powering and manoeuvring performances of the vessel in the harbor and coastal sea were focused on, so captive model tests were conducted up to the full-scale speed of 8 knots. Propeller open water, resistance, and self-propulsion tests of a 1/3.5-scaled model ship were performed in a towing tank, and the full-scale powering performance was predicted. Hydrodynamic coefficients in the mathematical model were obtained by rudder open water, horizontal planar motion mechanism tests of the same model ship. In particular, in static drift and pure yaw tests which were conducted at a speed of 2 to 8 knots, the linear hydrodynamic coefficients varied with the ship speed. The effect of the ship speed on the linear coefficients was considered in the mathematical model, and manoeuvring motions, such as turning circles and zig-zags, were simulated with various approach speeds and analyzed.

본 연구에서는 연안 및 항만 내에서 운항이 빈번한 총톤수 9.77톤급 소형어선을 대상으로 구속모형시험을 수행하고, 선속 별 운항성능을 추정하였다. 연안 및 항내에서는 소형 어선이 주로 중저속 운항함을 고려하여, 구속모형시험은 8노트 이하에서 수행하였다. 실선을 1/3.5 축소한 모형선을 대상으로 선형예인수조의 프로펠러 단독특성, 저항, 자항추진 시험을 통하여 실선 선속 별 저항추진성능을 추정하였다. 그리고 타 단독특성, 3자유도 정적 및 동적 HPMM 시험을 수행하고 수평면 운항모델 내 유체력 미계수들을 도출하였다. 특히 사항 및 순수선수동요시험은 2~8노트 영역에서 수행되었고, 주요 선형 유체력 미계수들이 선속에 따라 현저하게 변화함을 파악하였다. 선형 유체력 미계수들을 Froude 수에 대한 함수화 한 후, 선속 별 시뮬레이션을 통하여 대상 어선의 조종성능을 검토하였다.

Keywords

Acknowledgement

본 연구는 산업통상자원부 및 산업기술평가관리원 연구비지원으로 수행된 '자율운항선박 기술개발사업(20011689, 자율운항 지능형 시스템 실증 및 성능시험 개발(PNS4610))' 연구결과입니다. 대상 어선의 도면 및 정보를 공유해 주신 국립수산과학원 정성재 박사님께 감사드립니다.

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