• Title/Summary/Keyword: 표준 프로펠러

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Study on Propeller Design for Fishing Vessel's High Efficiency Standard Series Propeller (KF Series) (어선용 고효율 표준 시리즈(KF 시리즈) 프로펠러를 위한 설계 연구)

  • Lee, Won-Joon;Kim, Moon-Chan;Chun, Jang-Ho;Jang, Jin-Yeol;Mun, Won-Jun;Lee, Chang-Sup
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.14 no.2
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    • pp.73-80
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    • 2011
  • The present study deals with the propeller design for the standard new propeller series so called KF Series for 52ton class fishing vessel. The MAU or B series have been usually used for the fishing vessel's propeller, which are to be improved in consideration of the efficiency as well as the cavitation point of view. The high technology of propeller design has been applied to the design of 52ton class fishing vessel's propeller in the present study. The new designed series propellers will be validated by the experimental results whose data will be also used for the new series chart.

Experimental and Numerical Studies of the Flowfield around an Axisymmetric Body (축대칭 물체 주위유동의 실험적·수치적 연구)

  • Ahn, Jong-Woo;Song, In-Haeng;Park, Tae-Sun
    • Journal of the Society of Naval Architects of Korea
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    • v.34 no.3
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    • pp.9-18
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    • 1997
  • Experimental and numerical studies are carried out to investigate flow characteristics around an axisymmetric body with and without a compound propulsor. The effects of a compound propulsor are investigated as measuring the surface pressure distribution and the velocity profiles using LDV system in the cavitation tunnel of KRISO. The incompressible Reynolds-Averaged Navier-Stokes(RANS) equations are also solved using the finite volume method. The standard k-${\varepsilon}$ turbulence model is adopted for turbulence closure. In order to calculate propeller-hull interaction, the induced velocity calculated by lifting surface theory is considered as the boundary condition at the propeller plane. The experimental data obtained in this study can provide a useful database for development and validation of CFD code.

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A Study on Development of Standard Propellers for Coastal Fishing Vessels (연근해 어선용 표준형 추진기 개발)

  • Lee, Chang-Sub;Kang, Dae-Sun;Lee, Kun-Hwa;Kim, Moon-Chan;Moon, Il-Sung
    • Journal of Korea Ship Safrty Technology Authority
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    • s.31
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    • pp.14-24
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    • 2011
  • 최근 국제유가 상승과 탄소배출량 규제에 따른 친환경 선박의 개발 요구가 증대되고 있으며 이는 일반선 뿐만 아니라 어선에서도 마찬가지이다. 본 논문에서는 유류비 증가 및 어선의 노후화 등으로 인한 국내 어업 경쟁력의 약화 및 채산성 악화를 극복하기 위한 방안으로 연근해 어선용 추진기 개발을 위한 연구를 수행하였다. 현재 국내 어선현황에 기초하여 대표 선종인 130톤급 예망어선을 대상선으로 선정하고 추진기의 추진성능을 이론 및 실험적으로 평가 분석하였으며, 모형 시험 및 수치 해석 결과를 종합해 볼 때, 대상선의 프로펠러는 과도한 캐비테이션이 발생되는 상태에서 매운 높은 수준의 소음과 진동이 발생하는 것으로 추측된다. 이는 어선의 추진력 감소에 따른 연료비의 증대, 캐비테이션에 의한 추진기 손상, 과도하게 발생되는 소음에 따른 어획량 감소의 주된 원인이 된다. 본 연구를 통해 일반 상선의 추진성능 평가에 적용되는 최신 기술을 어선 추진기에 적용하여 모형시험 및 이론 성능 평가 과정을 정립하였으며, 이를 통해 앞으로 어선 추진기의 성능을 상당 부분 개선할 수 있음을 확인하였다.

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Modification and Representation of a Standardized River Data Tranformation Format based on ADCP Measurements (ADCP 기반 하천자료 표준 전송포맷 개선 및 표출기술 개발)

  • You, Hojun;Kim, Dongsu
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.161-161
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    • 2015
  • 최근 정보화 기술의 발달로 다양하고 방대한 정보들이 집적되고 있으며, 다양한 분야에서 집적된 자료의 활용성에 대한 관심이 보이고 있다. 특히, 수자원분야에서는 ADCP와 같은 최신 계측기법으로 확보되고 있는 방대한 양의 하천의 유속 및 하상 등의 자료를 수집, 저장, 처리, 검색하고자 하는 요구가 증가하고 있다. ADCP를 이용하여 유속을 계측할 경우, 재래식 계측 방법인 봉부자를 이용한 방법, 프로펠러유속계를 이용하는 방법에 비해 빠르고 정밀한 자료를 수집할 수 있는 장점이 있지만 계측자료의 양이 방대해짐에 따라 자료의 저장, 관리와 처리가 힘든 단점이 있어 ADCP를 이용한 자료의 저장 및 관리 처리를 자동화하는 소프트웨어에 대한 수요가 증가하고 있다.이러한 상황에 맞춰 수자원 발전을 위한 미국 대학 협력단체인 CUAHSI(Consortium of University for the Advancement of Hydrologic Science)에서는 수자원정보화시스템(Hydrologic Information System; HIS)의 구축하기 위해 표준화된 수자원 관측자료 데이터베이스 구조인 ODM(Observation Data Model)을 개발한 바 있다. 최근에는 하천 단면과 같은 하천 측정자료를 송수신할 경우 사용할 수 있는 표준 자료 프로토콜인 RiverML을 개발하여 Beta 버전을 제공하고 있다. 따라서 본 연구에서는 하천 자료 및 모형의 공유를 목적으로 HydroShare의 일환인 수자원 관측자료 중 하천자료의 전송용 언어인 RiverML과 하천의 시공간적 수리동역학적 자료 구조인 Arc River를 기반으로 ADCP의 계측자료를 RiverML로 변환하는 기술과 변환된 결과를 토대로 2차원 및 3차원으로 표출하는 GIS기반 소프트웨어를 개발하였다.

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A Study on Parts Manufacturer Approval in Civil Aviation Law (항공기 부품제작자증명에 관한 연구)

  • Lee, Kang-Yi;Jin, Young-Kwon;Lee, Jong-Hee;Lee, Kwang-Hee
    • The Korean Journal of Air & Space Law and Policy
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    • v.17
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    • pp.133-152
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    • 2003
  • Certification by Civil Aviation Law is necessary for aircraft parts and appliances as well as aircraft, engines, and propellers to ensure safety and reliability in operation. Advanced countries in aerospace industry as like U.S.A require Parts Manufacturer Approval for aircraft parts and Technical Standard Order Authorization for designated appliances. However, there are no legal requirements for certification of aircraft parts and appliances in Korea until now. This study presents the draft to revise Civil Aviation Law, which is applicable to set up domestic certification system and maintain it equivalent to U.S. Federal Aviation Regulation.

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Numerical Study of the Flow Field Around an Axisymmetric Body with Integrated Propulsors (복합추진장치가 포함된 축대칭 물체 주위유동의 수치적 연구)

  • Jong-Woo Ahn;Il-Sung Moon;Sang-Woo Pyo;Jung-Chun Suh
    • Journal of the Society of Naval Architects of Korea
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    • v.36 no.4
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    • pp.1-8
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    • 1999
  • Numerical study is carried out to investigate flow characteristics around an axisymmetric body with and without an integrated propulsor. The incompressible Reynolds-Averaged Navier-Stokes(RANS) equations are also solved using the finite volume method and the standard $k-\varepsilon$ turbulence model for turbulence closure. In order to investigate the propulsor-hull interaction, the induced velocity calculated by surface panel methods is utilized for the boundary condition at the propeller plane. The calculated results are compared to the experimental results. It is considered that the present numerical code can be used for design of an integrated propulsor.

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A Study on the Improvement of Steering Command System through Accident Analysis of Azimuth thruster using STAMP Method

  • HyunDong Kim;SangHoon Lee;JeongMin Kim
    • Journal of the Korea Society of Computer and Information
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    • v.28 no.9
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    • pp.149-158
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    • 2023
  • With the global paradigm shift towards climate change, the shipbuilding industry is also considering propulsion systems that utilize eco-friendly fuels various propulsion systems are gaining attention as a result. In conventional propulsion systems, typically consisting of propellers and rudders, have evolved into a diverse range of systems due to the development of a special propulsion system known as the azimuth thruster. While azimuth thrusters were previously commonly installed on tugboats, they are now extensively used on offshore plant operation ships equipped with dynamic positioning systems. However, these azimuth thrusters require different steering methods compared to conventional propulsion systems, leading to a significant learning curve for the crew members boarding such vessels. Furthermore the availability of education related to these special propulsion systems is limited. This study aims to analyze accidents caused by inadequate control of vessels equipped with azimuth thrusters using the STAMP technique. And it proposes the necessity of standard steering commands for the safe operation of vessels equipped with special propellers.

A Study on the Forced Fitting Method of Stern Tube Bearing for Propulsion Shafting in Ships (선박 추진축계 선미관 베어링의 강제 압입 피팅 방식에 관한 연구)

  • Cho, Kwon-Hae;Lee, Jae-Hyun;Kim, Yang-Gon
    • Journal of Advanced Marine Engineering and Technology
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    • v.34 no.5
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    • pp.653-660
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    • 2010
  • The stern tube bearing is installed to the stern tube and stern boss casting by using the method of the force pressured fitting. The adequate value of the interference between the stern tube bearing and casting should be considered owing to the slip. In this study, to review and compare the fitting force and the contact pressure, the theory of thick walled cylinder is considered to clarify the formula which received from the maker. Also the fitting force and contact pressure are calculated by using the standard value of interference, Young's modulus, Poisson's ratio and friction coefficient.