A study on equivalence-ratio dependence of minimum ignition energy based on initial burning velocity

Eiichi Murase, Osamu Moriue, Hideki Hashimoto, Isei Matsuzaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)1839-1847
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume79
Issue number805
DOIs
Publication statusPublished - Oct 14 2013

Fingerprint

ignition
Ignition
equivalence
flames
energy
air
Butane
butanes
Air
Methane
methane
shadowgraph photography
spark ignition
flame propagation
Electric sparks
curvature
moments
radii
Gases
gases

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

A study on equivalence-ratio dependence of minimum ignition energy based on initial burning velocity. / Murase, Eiichi; Moriue, Osamu; Hashimoto, Hideki; Matsuzaki, Isei.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 79, No. 805, 14.10.2013, p. 1839-1847.

Research output: Contribution to journalArticle

@article{366e8fddf3d848189afcc573d1afeefc,
title = "A study on equivalence-ratio dependence of minimum ignition energy based on initial burning velocity",
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.",
author = "Eiichi Murase and Osamu Moriue and Hideki Hashimoto and Isei Matsuzaki",
year = "2013",
month = "10",
day = "14",
doi = "10.1299/kikaib.79.1839",
language = "English",
volume = "79",
pages = "1839--1847",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "The Japan Society of Mechanical Engineers",
number = "805",

}

TY - JOUR

T1 - A study on equivalence-ratio dependence of minimum ignition energy based on initial burning velocity

AU - Murase, Eiichi

AU - Moriue, Osamu

AU - Hashimoto, Hideki

AU - Matsuzaki, Isei

PY - 2013/10/14

Y1 - 2013/10/14

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84885088055&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84885088055&partnerID=8YFLogxK

U2 - 10.1299/kikaib.79.1839

DO - 10.1299/kikaib.79.1839

M3 - Article

AN - SCOPUS:84885088055

VL - 79

SP - 1839

EP - 1847

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 805

ER -