Journal
INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING
Volume 6, Issue 2, Pages 363-379Publisher
SOC NAVAL ARCHITECTS KOREA
DOI: 10.2478/IJNAOE-2013-0185
Keywords
Greenhouse gas emissions; Fuel costs; Frictional resistance; Air lubrication; Air layer; Air injection; Net power savings
Categories
Funding
- Development of the key technology for a ship drag reduction and propulsion efficiency improvement [10040030]
- Ministry of Trade, Industry and Energy
- Korea Evaluation Institute of Industrial Technology (KEIT) [10040030] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In an effort to cope with recent high oil price and global warming, developments of air lubricated ships have been pursued to reduce greenhouse gas emissions and to save fuel costs by reducing the frictional resistance. In this study, reduction in the frictional resistance by air lubrication with air layers generated on the lower surface of a flat plate was investigated experimentally in the large water tunnel of SSMB. The generated air layers were observed, and changes in the local frictional drag were measured at various flow rates of injected air The results indicated that air lubrication with air layers might be useful in reducing the frictional resistance at specific conditions of air injection. Accordingly, resistance and self-propulsion tests for a 66K DWT bulk carrier were carried out in the towing tank of SSMB to estimate the expected net power savings.
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