Simulation of a diffusion flame in turbulent mixing layer by the flame hole dynamics model with level-set method

J. Kim; S. Chung; K. Ahn; J. Kim

doi:10.1080/13647830500376175

Simulation of a diffusion flame in turbulent mixing layer by the flame hole dynamics model with level-set method

J. Kim^*, S. Chung, K. Ahn, J. Kim^*

^*Corresponding author for this work

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

9 Scopus citations

Abstract

The partial quenching structure of diffusion flames, arising from the phenomenon of turbulent flame lift off, is investigated in a turbulent mixing layer by the method of flame hole dynamics. Modification of the flame hole dynamics by including the level-set method is specifically aimed to properly take into account the effect of slow flame-edge response near the crossover scalar dissipation rate at which the edge propagation speed vanishes. Simulating the flame hole dynamics with the level-set method results in two major improvements. The first improvement is observed in stabilizing lifted turbulent diffusion flames. The three necessary conditions for lifted stabilization are proposed and numerically tested to show that rapid variation of the edge propagation speed near the crossover scalar dissipation rate helps lifted stabilization. Secondly, an improvement in the statistical properties of the stationary turbulence reacting state is observed in that (1) the lift-off height is found to be higher because of the streamwise flow pushing the turbulent edge front to the downstream direction and (2) the partial burning probability, conditioned with the scalar dissipation rate, exhibits a realistic smooth transition across the crossover scalar dissipation rate.

Original language	English (US)
Pages (from-to)	219-240
Number of pages	22
Journal	Combustion Theory and Modelling
Volume	10
Issue number	2
DOIs	https://doi.org/10.1080/13647830500376175
State	Published - Apr 2006
Externally published	Yes

Bibliographical note

Funding Information:
The present study was financially supported by the Carbon Dioxide Reduction and Sequestration R&D Center, a 21st Century Frontier Research Center funded by the Korean Ministry of Science and Technology. The authors also would like to express their appreciation for the use of computing system of the KISTI Supercomputing Center under The Strategic Supercomputing Support Program with Dr Sang Min Lee as Technical Supporter.

Keywords

Flame edge
Flame hole dynamics
Level set method
Lifted stabilization

ASJC Scopus subject areas

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

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10.1080/13647830500376175

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title = "Simulation of a diffusion flame in turbulent mixing layer by the flame hole dynamics model with level-set method",

abstract = "The partial quenching structure of diffusion flames, arising from the phenomenon of turbulent flame lift off, is investigated in a turbulent mixing layer by the method of flame hole dynamics. Modification of the flame hole dynamics by including the level-set method is specifically aimed to properly take into account the effect of slow flame-edge response near the crossover scalar dissipation rate at which the edge propagation speed vanishes. Simulating the flame hole dynamics with the level-set method results in two major improvements. The first improvement is observed in stabilizing lifted turbulent diffusion flames. The three necessary conditions for lifted stabilization are proposed and numerically tested to show that rapid variation of the edge propagation speed near the crossover scalar dissipation rate helps lifted stabilization. Secondly, an improvement in the statistical properties of the stationary turbulence reacting state is observed in that (1) the lift-off height is found to be higher because of the streamwise flow pushing the turbulent edge front to the downstream direction and (2) the partial burning probability, conditioned with the scalar dissipation rate, exhibits a realistic smooth transition across the crossover scalar dissipation rate.",

keywords = "Flame edge, Flame hole dynamics, Level set method, Lifted stabilization",

author = "J. Kim and S. Chung and K. Ahn and J. Kim",

note = "Funding Information: The present study was financially supported by the Carbon Dioxide Reduction and Sequestration R&D Center, a 21st Century Frontier Research Center funded by the Korean Ministry of Science and Technology. The authors also would like to express their appreciation for the use of computing system of the KISTI Supercomputing Center under The Strategic Supercomputing Support Program with Dr Sang Min Lee as Technical Supporter.",

year = "2006",

month = apr,

doi = "10.1080/13647830500376175",

language = "English (US)",

volume = "10",

pages = "219--240",

journal = "Combustion Theory and Modelling",

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AU - Kim, J.

AU - Chung, S.

AU - Ahn, K.

AU - Kim, J.

N1 - Funding Information: The present study was financially supported by the Carbon Dioxide Reduction and Sequestration R&D Center, a 21st Century Frontier Research Center funded by the Korean Ministry of Science and Technology. The authors also would like to express their appreciation for the use of computing system of the KISTI Supercomputing Center under The Strategic Supercomputing Support Program with Dr Sang Min Lee as Technical Supporter.

PY - 2006/4

Y1 - 2006/4

N2 - The partial quenching structure of diffusion flames, arising from the phenomenon of turbulent flame lift off, is investigated in a turbulent mixing layer by the method of flame hole dynamics. Modification of the flame hole dynamics by including the level-set method is specifically aimed to properly take into account the effect of slow flame-edge response near the crossover scalar dissipation rate at which the edge propagation speed vanishes. Simulating the flame hole dynamics with the level-set method results in two major improvements. The first improvement is observed in stabilizing lifted turbulent diffusion flames. The three necessary conditions for lifted stabilization are proposed and numerically tested to show that rapid variation of the edge propagation speed near the crossover scalar dissipation rate helps lifted stabilization. Secondly, an improvement in the statistical properties of the stationary turbulence reacting state is observed in that (1) the lift-off height is found to be higher because of the streamwise flow pushing the turbulent edge front to the downstream direction and (2) the partial burning probability, conditioned with the scalar dissipation rate, exhibits a realistic smooth transition across the crossover scalar dissipation rate.

AB - The partial quenching structure of diffusion flames, arising from the phenomenon of turbulent flame lift off, is investigated in a turbulent mixing layer by the method of flame hole dynamics. Modification of the flame hole dynamics by including the level-set method is specifically aimed to properly take into account the effect of slow flame-edge response near the crossover scalar dissipation rate at which the edge propagation speed vanishes. Simulating the flame hole dynamics with the level-set method results in two major improvements. The first improvement is observed in stabilizing lifted turbulent diffusion flames. The three necessary conditions for lifted stabilization are proposed and numerically tested to show that rapid variation of the edge propagation speed near the crossover scalar dissipation rate helps lifted stabilization. Secondly, an improvement in the statistical properties of the stationary turbulence reacting state is observed in that (1) the lift-off height is found to be higher because of the streamwise flow pushing the turbulent edge front to the downstream direction and (2) the partial burning probability, conditioned with the scalar dissipation rate, exhibits a realistic smooth transition across the crossover scalar dissipation rate.

KW - Flame edge

KW - Flame hole dynamics

KW - Level set method

KW - Lifted stabilization

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Simulation of a diffusion flame in turbulent mixing layer by the flame hole dynamics model with level-set method

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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