Flame acceleration in long narrow open channels

Vadim N. Kurdyumov; Moshe Matalon

doi:10.1016/j.proci.2012.07.045

Flame acceleration in long narrow open channels

Vadim N. Kurdyumov, Moshe Matalon

Mechanical Science and Engineering

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

Abstract

We study the propagation of premixed flames in long but finite channels, when the mixture is ignited at one end and both ends remain open and exposed to atmospheric pressure. Thermal expansion produces a continuous flow of burned gas directed away from the flame and towards the end of the channel where ignition took place. Owing to viscous drag, the flow is retarded at the walls and accelerated in the center, producing a pressure gradient that pushes the unburned gas ahead of the flame towards the other end of the channel. As a result the flame accelerates when it travels from end to end of the channel. The total travel time depends on the length of the channel and is proportional to γ^-1ln(1 + γ), where c is the heat release parameter.

Original language	English (US)
Pages (from-to)	865-872
Number of pages	8
Journal	Proceedings of the Combustion Institute
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/j.proci.2012.07.045
State	Published - 2013

Keywords

Flame acceleration
Flame propagation in tubes
Premixed flames

ASJC Scopus subject areas

Chemical Engineering(all)
Mechanical Engineering
Physical and Theoretical Chemistry

Online availability

10.1016/j.proci.2012.07.045

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title = "Flame acceleration in long narrow open channels",

abstract = "We study the propagation of premixed flames in long but finite channels, when the mixture is ignited at one end and both ends remain open and exposed to atmospheric pressure. Thermal expansion produces a continuous flow of burned gas directed away from the flame and towards the end of the channel where ignition took place. Owing to viscous drag, the flow is retarded at the walls and accelerated in the center, producing a pressure gradient that pushes the unburned gas ahead of the flame towards the other end of the channel. As a result the flame accelerates when it travels from end to end of the channel. The total travel time depends on the length of the channel and is proportional to γ-1ln(1 + γ), where c is the heat release parameter.",

keywords = "Flame acceleration, Flame propagation in tubes, Premixed flames",

author = "Kurdyumov, {Vadim N.} and Moshe Matalon",

note = "Funding Information: M.M. acknowledges partial support by the National Science Foundation under Grant CBET-1067259 . V.K. acknowledges the support of Spanish MEC under projects # ENE2011-27686-C02-01 and CSD2011-00011 .",

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AU - Kurdyumov, Vadim N.

AU - Matalon, Moshe

N1 - Funding Information: M.M. acknowledges partial support by the National Science Foundation under Grant CBET-1067259 . V.K. acknowledges the support of Spanish MEC under projects # ENE2011-27686-C02-01 and CSD2011-00011 .

PY - 2013

Y1 - 2013

N2 - We study the propagation of premixed flames in long but finite channels, when the mixture is ignited at one end and both ends remain open and exposed to atmospheric pressure. Thermal expansion produces a continuous flow of burned gas directed away from the flame and towards the end of the channel where ignition took place. Owing to viscous drag, the flow is retarded at the walls and accelerated in the center, producing a pressure gradient that pushes the unburned gas ahead of the flame towards the other end of the channel. As a result the flame accelerates when it travels from end to end of the channel. The total travel time depends on the length of the channel and is proportional to γ-1ln(1 + γ), where c is the heat release parameter.

AB - We study the propagation of premixed flames in long but finite channels, when the mixture is ignited at one end and both ends remain open and exposed to atmospheric pressure. Thermal expansion produces a continuous flow of burned gas directed away from the flame and towards the end of the channel where ignition took place. Owing to viscous drag, the flow is retarded at the walls and accelerated in the center, producing a pressure gradient that pushes the unburned gas ahead of the flame towards the other end of the channel. As a result the flame accelerates when it travels from end to end of the channel. The total travel time depends on the length of the channel and is proportional to γ-1ln(1 + γ), where c is the heat release parameter.

KW - Flame acceleration

KW - Flame propagation in tubes

KW - Premixed flames

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Flame acceleration in long narrow open channels

Abstract

Keywords

ASJC Scopus subject areas

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