2013 Fiscal Year Final Research Report
A Study of Auto-ignited Combustion Mechanisms of Ultra-lean Mixture under Elevated Pressure
| Project/Area Number |
24760175
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thermal engineering
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| Research Institution | Nihon University |
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Principal Investigator |
IIJIMA Akira 日本大学, 理工学部, 助教 (50434121)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 燃焼 / 自着火 / 分光測定 / 可視化 / 圧力振動 / 異常燃焼 / 予混合圧縮着火 / HCCI |
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| Research Abstract |
Combustion analyses were conducted with an optically accessible engine that allowed the entire bore area to be visualized for the purpose of making clear the characteristics that induce autoignition of lean air-fuel mixture. Specifically, we investigated as follows, (1) Characteristics of rapid combustion and knocking accompanied by in-cylinder pressure oscillation in homogeneous charge compression ignition (HCCI) combustion. (2) Reaction processes of autoignition and combustion in lean air-fuel mixture by using FT-IR gas analyses and chemical kinetic simulation. The results revealed that in extremely rapid HCCI combustion, the autoignited flame was dispersed in the cylinder in its initial stage, but the remaining unburned end gas rapidly autoignited at a certain point. That gave rise to knocking combustion accompanied by cylinder pressure oscillations. In addition, autoignition and combustion reactions were identified by gas analyses and chemical kinetic simulation.
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[Presentation]2012
Author(s)
飯島晃良,石川芳広,江森剛,浅沼光雄,庄司秀夫
Organizer
第51回燃焼シンポジウム
Place of Presentation
愛知県産業労働センターウインクあいち
Year and Date
2012-12-06
