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공기윤활에 의한 액화천연가스운반선의 마찰저항저감 평가 및 공기 분사부 배치에 대한 연구Study on the Evaluation of Frictional Drag Reduction by Air Lubrication and the Arrangement of Air Injection Parts for a Liquefied Natural Gas Carrier
- Other Titles
- Study on the Evaluation of Frictional Drag Reduction by Air Lubrication and the Arrangement of Air Injection Parts for a Liquefied Natural Gas Carrier
- Issue Date
- 6월-2021
- Publisher
- 대한조선학회
- Keywords
- Air layer thickness(공기층 두께); Rough surface(거친 표면); Frictional drag reduction(마찰항력감소); Liquefied natural gas carrier(액화천연가스운반선); Air lubrication(공기윤활)
- Citation
- 대한조선학회 논문집, v.58, no.3, pp 144 - 157
- Pages
- 14
- Journal Title
- 대한조선학회 논문집
- Volume
- 58
- Number
- 3
- Start Page
- 144
- End Page
- 157
- ISSN
- 1225-1143
- Abstract
- Brake Horse Power (BHP) reduction ratios by air injection to the underside of the hull surface in an actual ship are predicted using an unstructured finite-volume CFD solver and compared with the sea trial results. In addition, air lubrication system installed on the existing vessel is investigated to find a good solution for additional drag reduction. As a results, it is found that the thickness of the air layer should be minimized within a stable range while securing the area covered by the air layer as much as possible. Furthermore, the amount of frictional drag reduced by air injection is found to be independent of surface roughness and still effective on rough surface. Based on the results of this study, it is expected that systematic and reliable air lubrication system can be designed and evaluated using the proposed method.
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Collections - 선박연구본부 > Mid-size Initial Ship Design Unit > 1. Journal Articles
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