A Study on Equivalence-Ratio Dependence of Minimum Ignition Energy Based on Initial Burning Velocity
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- MURASE Eiichi
- Kyushu University, Department of Mechanical Engineering
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- MORIUE Osamu
- 九州大学大学院工学研究院
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- HASHIMOTO Hideki
- 九州大学大学院工学研究院
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- MATSUZAKI Isei
- 日産自動車(株)
Bibliographic Information
- Other Title
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- 初期燃焼速度に着目した最小点火エネルギーの当量比依存性に関する研究
Abstract
Spark ignition of premixed gases was experimentally studied. Minimum ignition energy and initial burning velocity, which is a burning velocity at an initial stage of flame propagation, were measured and their dependences on equivalence ratio were discussed. Minimum ignition energy takes a minimum value when equivalence ratio is around 0.9 for methane/air mixtures, and around 1.5 for n-butane/air mixtures, which corresponds with the study of Lewis and von Elbe. A shadowgraph technique was used to observe the growth of the flame kernels. A burning velocity was measured from the images of the flame kernel, and initial burning velocity was defined as a burning velocity at the moment when the equivalent radius of the flame kernel is approximately 3.0mm. Initial burning velocity takes a maximum value when equivalence ratio is around 0.9 for methane/air mixtures, and around 1.5 for n-butane/air mixtures, while laminar burning velocity of well-grown flame takes a maximum value when equivalence ratio is around 1.1 for both mixtures as known well. This is caused by the curvature of flame surface at the initial stage. It is suggested that the equivalence-ratio dependence of minimum ignition energy is derived from that of initial burning velocity.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 79 (805), 1839-1847, 2013
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001206260749440
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- NII Article ID
- 130004555267
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- ISSN
- 18848346
- 03875016
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed