2017 Fiscal Year Final Research Report
Modeling of the spark discharge ignition process in the spark-ignition engine
| Project/Area Number |
15K05832
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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 |
Thermal engineering
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| Research Institution | Okayama University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 燃焼 / プラズマ / 熱機関 / 分光計測 / 燃焼CFD |
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| Outline of Final Research Achievements |
The purpose of this study is to model the spark discharge ignition process in the spark-ignition engine under lean-burn conditions. Spark discharge and initial flame kernel development were visualized. The larger displacement of spark discharge under lean conditions affects the cyclic fluctuation of initial flame kernel. We were able to measure a time series of emission spectra from the spark discharge and initial flame kernel. The plasma temperature of the spark discharge was nearly 6,000 K and that thermal energy was transferred from the spark plasma channel to the combustible mixture. The gas temperature of the initial flame kernel approached that of the adiabatic flame temperature.
The modeling of the spark ignition process is examined from a spark discharge to a flame kernel growth. The spark channel behavior is modeled by particles movement. It is possible to estimate the thermal energy transfer from the spark channel behavior to the gaseous mixture.
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| Free Research Field |
熱工学
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