Turbulent combustion of hydrogen-CO mixtures

Alexey A. Burluka; Ahmed M.T. El-Dein Hussin; Christopher G.W. Sheppard; Kexin Liu; Victoria Sanderson

doi:10.1007/s10494-011-9342-3

Turbulent combustion of hydrogen-CO mixtures

Alexey A. Burluka, Ahmed M.T. El-Dein Hussin, Christopher G.W. Sheppard, Kexin Liu, Victoria Sanderson

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

9 Citations (Scopus)

Abstract

Laminar and turbulent burning velocities were measured in a closed-volume fan-stirred vessel for H₂-CO mixtures using two independent methods of flame definition. It has been shown that the unsteady flame development is an important factor and it needs to be taken into account for comparison of the burning rates obtained in different experiments. For the atmospheric pressure flames, the mixtures with faster laminar flame velocities burnt faster in turbulent flow despite the fact that the lean flames exhibit cellular structures. However, even a modest increase of the initial pressure promotes strongly cellularity and causes a significant acceleration of a lean laminar flame. The same lean flame burns faster in turbulent flow as well and this increase in the rate of combustion is greater that can be deduced from variation of the molecular heat diffusivity and laminar flame speed.

Original language	English
Pages (from-to)	735-749
Number of pages	15
Journal	Flow, Turbulence and Combustion
Volume	86
Issue number	3-4
Early online date	13 Mar 2011
DOIs	https://doi.org/10.1007/s10494-011-9342-3
Publication status	Published - 1 Apr 2011

Keywords

Flame instability
Hydrogen and carbon monoxide flames
Syngas combustion
Turbulent burning rate
Turbulent combustion

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10.1007/s10494-011-9342-3

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abstract = "Laminar and turbulent burning velocities were measured in a closed-volume fan-stirred vessel for H2-CO mixtures using two independent methods of flame definition. It has been shown that the unsteady flame development is an important factor and it needs to be taken into account for comparison of the burning rates obtained in different experiments. For the atmospheric pressure flames, the mixtures with faster laminar flame velocities burnt faster in turbulent flow despite the fact that the lean flames exhibit cellular structures. However, even a modest increase of the initial pressure promotes strongly cellularity and causes a significant acceleration of a lean laminar flame. The same lean flame burns faster in turbulent flow as well and this increase in the rate of combustion is greater that can be deduced from variation of the molecular heat diffusivity and laminar flame speed.",

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T1 - Turbulent combustion of hydrogen-CO mixtures

AU - Burluka, Alexey A.

AU - El-Dein Hussin, Ahmed M.T.

AU - Sheppard, Christopher G.W.

AU - Liu, Kexin

AU - Sanderson, Victoria

PY - 2011/4/1

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N2 - Laminar and turbulent burning velocities were measured in a closed-volume fan-stirred vessel for H2-CO mixtures using two independent methods of flame definition. It has been shown that the unsteady flame development is an important factor and it needs to be taken into account for comparison of the burning rates obtained in different experiments. For the atmospheric pressure flames, the mixtures with faster laminar flame velocities burnt faster in turbulent flow despite the fact that the lean flames exhibit cellular structures. However, even a modest increase of the initial pressure promotes strongly cellularity and causes a significant acceleration of a lean laminar flame. The same lean flame burns faster in turbulent flow as well and this increase in the rate of combustion is greater that can be deduced from variation of the molecular heat diffusivity and laminar flame speed.

AB - Laminar and turbulent burning velocities were measured in a closed-volume fan-stirred vessel for H2-CO mixtures using two independent methods of flame definition. It has been shown that the unsteady flame development is an important factor and it needs to be taken into account for comparison of the burning rates obtained in different experiments. For the atmospheric pressure flames, the mixtures with faster laminar flame velocities burnt faster in turbulent flow despite the fact that the lean flames exhibit cellular structures. However, even a modest increase of the initial pressure promotes strongly cellularity and causes a significant acceleration of a lean laminar flame. The same lean flame burns faster in turbulent flow as well and this increase in the rate of combustion is greater that can be deduced from variation of the molecular heat diffusivity and laminar flame speed.

KW - Flame instability

KW - Hydrogen and carbon monoxide flames

KW - Syngas combustion

KW - Turbulent burning rate

KW - Turbulent combustion

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JO - Flow, Turbulence and Combustion

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Turbulent combustion of hydrogen-CO mixtures

Abstract

Keywords

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