On the structure and extinction dynamics of partially-premixed flames: Theory and experiment

C. K. Law; D. L. Zhu; T. X. Li; S. H. Chung; J. S. Kim

doi:10.1080/00102208908924031

On the structure and extinction dynamics of partially-premixed flames: Theory and experiment

C. K. Law, D. L. Zhu, T. X. Li^*, S. H. Chung, J. S. Kim

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

The interaction and extinction dynamics of a partially-premixed flame ensemble, consisting of a premixed flame and a nonpremixed flame, are theoretically and experimentally studied for the counterflow configuration generated by a premixed fuel/oxidizer/inert stream and a fuel/inert stream. Separate asymptotic analyses are performed for the structure and extinction of a single merged flame, a binary premixed-nonpremixed flame, and a binary premixed–premixed flame; in the last case it is recognized that under certain situations a nonpremixed flame can exhibit the characteristics of a premixed flame. Theoretical results show that the extinction of a binary flame always occurs in a single stage, with the individual flames separated. The extent of separateness can be further modified by the preferential diffusion nature of the mixture. These predictions are completely substantiated by experimental results obtained by using mixtures consisting of methane, ethane or propane as the fuel and O₂/N₂ as the oxidizer.

Original language	English (US)
Pages (from-to)	199-232
Number of pages	34
Journal	Combustion science and technology
Volume	64
Issue number	4-6
DOIs	https://doi.org/10.1080/00102208908924031
State	Published - Apr 1 1989
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
General Physics and Astronomy

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10.1080/00102208908924031

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title = "On the structure and extinction dynamics of partially-premixed flames: Theory and experiment",

abstract = "The interaction and extinction dynamics of a partially-premixed flame ensemble, consisting of a premixed flame and a nonpremixed flame, are theoretically and experimentally studied for the counterflow configuration generated by a premixed fuel/oxidizer/inert stream and a fuel/inert stream. Separate asymptotic analyses are performed for the structure and extinction of a single merged flame, a binary premixed-nonpremixed flame, and a binary premixed–premixed flame; in the last case it is recognized that under certain situations a nonpremixed flame can exhibit the characteristics of a premixed flame. Theoretical results show that the extinction of a binary flame always occurs in a single stage, with the individual flames separated. The extent of separateness can be further modified by the preferential diffusion nature of the mixture. These predictions are completely substantiated by experimental results obtained by using mixtures consisting of methane, ethane or propane as the fuel and O2/N2 as the oxidizer.",

author = "Law, {C. K.} and Zhu, {D. L.} and Li, {T. X.} and Chung, {S. H.} and Kim, {J. S.}",

note = "Funding Information: CKL, TXL and DL% were supported by the Basic Energy Sciences Division of the Department of Energy, while SHC and JSK were supported by the Korea Science and Engineering Foundation.",

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doi = "10.1080/00102208908924031",

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T2 - Theory and experiment

AU - Law, C. K.

AU - Zhu, D. L.

AU - Li, T. X.

AU - Chung, S. H.

AU - Kim, J. S.

N1 - Funding Information: CKL, TXL and DL% were supported by the Basic Energy Sciences Division of the Department of Energy, while SHC and JSK were supported by the Korea Science and Engineering Foundation.

PY - 1989/4/1

Y1 - 1989/4/1

N2 - The interaction and extinction dynamics of a partially-premixed flame ensemble, consisting of a premixed flame and a nonpremixed flame, are theoretically and experimentally studied for the counterflow configuration generated by a premixed fuel/oxidizer/inert stream and a fuel/inert stream. Separate asymptotic analyses are performed for the structure and extinction of a single merged flame, a binary premixed-nonpremixed flame, and a binary premixed–premixed flame; in the last case it is recognized that under certain situations a nonpremixed flame can exhibit the characteristics of a premixed flame. Theoretical results show that the extinction of a binary flame always occurs in a single stage, with the individual flames separated. The extent of separateness can be further modified by the preferential diffusion nature of the mixture. These predictions are completely substantiated by experimental results obtained by using mixtures consisting of methane, ethane or propane as the fuel and O2/N2 as the oxidizer.

AB - The interaction and extinction dynamics of a partially-premixed flame ensemble, consisting of a premixed flame and a nonpremixed flame, are theoretically and experimentally studied for the counterflow configuration generated by a premixed fuel/oxidizer/inert stream and a fuel/inert stream. Separate asymptotic analyses are performed for the structure and extinction of a single merged flame, a binary premixed-nonpremixed flame, and a binary premixed–premixed flame; in the last case it is recognized that under certain situations a nonpremixed flame can exhibit the characteristics of a premixed flame. Theoretical results show that the extinction of a binary flame always occurs in a single stage, with the individual flames separated. The extent of separateness can be further modified by the preferential diffusion nature of the mixture. These predictions are completely substantiated by experimental results obtained by using mixtures consisting of methane, ethane or propane as the fuel and O2/N2 as the oxidizer.

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DO - 10.1080/00102208908924031

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EP - 232

JO - Combustion science and technology

JF - Combustion science and technology

IS - 4-6

ER -

On the structure and extinction dynamics of partially-premixed flames: Theory and experiment

Abstract

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