| Project/Area Number |
25420877
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | National Maritime Research Institute |
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Principal Investigator |
Takagi Masahide 国立研究開発法人 海上技術安全研究所, その他部局等, 研究員 (50371092)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAUCHI Satoshi 国立研究開発法人 海上技術安全研究所, その他の部局等, 研究員 (20549993)
IMAI Yasuo 国立研究開発法人 海上技術安全研究所, その他の部局等, 研究員 (40426218)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | ガス燃焼 / メタンスリップ低減 / 高圧化 / 自着火 / 急速燃焼 / メタンスリップ低減手法 |
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| Outline of Final Research Achievements |
It is required to reduce unburnt methane from natural gas engines. Methane has a high global warming potential and the impact of methane on global warming is 20 times that of carbon dioxide. The rapid combustion by auto-ignition resulting from unburnt region and reduction of the quenching distance by the high ambient pressure have been proposed as a methane reduction technique.
As a result, auto-ignition which do not affect the combustion (pressure rise) was not able to reduce the unburnt methane. Reduction of 25% methane concentration could be achieved by an increase from 2.0 to 4.5MPa of ambient pressure at ignition timing.
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