Vaporization Damköhler number and enrichment effects in spray diffusion flames in an oscillating flow field

J. B. Greenberg; D. Katoshevski

doi:10.1080/00102202.2013.764288

Vaporization Damköhler number and enrichment effects in spray diffusion flames in an oscillating flow field

J. B. Greenberg, D. Katoshevski

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

6 Scopus citations

Abstract

The sensitivity to the vaporization Damköhler number of the behavior of a coflow laminar spray diffusion flame in an oscillating flow field is investigated. Droplet grouping induced by the host gas flow oscillations is accounted for, and its effect is described through a specially constructed model for the vaporization Damköhler number that responds to the proximity of the droplets as they cluster. A formal analytical solution is developed, and the dynamics of the spray flame front shapes and thermal fields are deduced. Computed results demonstrate how strongly the vaporization Damköhler number impacts on the type of primary homogeneous flame formed and on the possible existence of multiple flame sheets as the flow field oscillates. In addition, isolated regions of high fuel vapor concentrations are produced by fuel droplet enrichment. The presence of resulting parallel fluctuating thermal fields indicates a potential impact on undesirable pollutants production.

Original language	English
Pages (from-to)	898-919
Number of pages	22
Journal	Combustion Science and Technology
Volume	185
Issue number	6
DOIs	https://doi.org/10.1080/00102202.2013.764288
State	Published - 3 Jun 2013

Keywords

Droplet grouping
Modeling
Spray combustion

ASJC Scopus subject areas

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

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10.1080/00102202.2013.764288

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@article{935e11a0a8ed42c88f27e80cf1008e3c,

title = "Vaporization Damk{\"o}hler number and enrichment effects in spray diffusion flames in an oscillating flow field",

abstract = "The sensitivity to the vaporization Damk{\"o}hler number of the behavior of a coflow laminar spray diffusion flame in an oscillating flow field is investigated. Droplet grouping induced by the host gas flow oscillations is accounted for, and its effect is described through a specially constructed model for the vaporization Damk{\"o}hler number that responds to the proximity of the droplets as they cluster. A formal analytical solution is developed, and the dynamics of the spray flame front shapes and thermal fields are deduced. Computed results demonstrate how strongly the vaporization Damk{\"o}hler number impacts on the type of primary homogeneous flame formed and on the possible existence of multiple flame sheets as the flow field oscillates. In addition, isolated regions of high fuel vapor concentrations are produced by fuel droplet enrichment. The presence of resulting parallel fluctuating thermal fields indicates a potential impact on undesirable pollutants production.",

keywords = "Droplet grouping, Modeling, Spray combustion",

author = "Greenberg, {J. B.} and D. Katoshevski",

note = "Funding Information: J.B.G. acknowledges the partial support of the Lady Davis Chair in Aerospace Engineering and the Technion Fund for the Promotion of Research. Thanks are due to Yonit Mindelis for her professional and dedicated technical assistance and discerning comments on the manuscript. This research was supported by the Israel Science Foundation (Grant No. 621/11).",

year = "2013",

month = jun,

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doi = "10.1080/00102202.2013.764288",

language = "English",

volume = "185",

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journal = "Combustion Science and Technology",

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TY - JOUR

T1 - Vaporization Damköhler number and enrichment effects in spray diffusion flames in an oscillating flow field

AU - Greenberg, J. B.

AU - Katoshevski, D.

N1 - Funding Information: J.B.G. acknowledges the partial support of the Lady Davis Chair in Aerospace Engineering and the Technion Fund for the Promotion of Research. Thanks are due to Yonit Mindelis for her professional and dedicated technical assistance and discerning comments on the manuscript. This research was supported by the Israel Science Foundation (Grant No. 621/11).

PY - 2013/6/3

Y1 - 2013/6/3

N2 - The sensitivity to the vaporization Damköhler number of the behavior of a coflow laminar spray diffusion flame in an oscillating flow field is investigated. Droplet grouping induced by the host gas flow oscillations is accounted for, and its effect is described through a specially constructed model for the vaporization Damköhler number that responds to the proximity of the droplets as they cluster. A formal analytical solution is developed, and the dynamics of the spray flame front shapes and thermal fields are deduced. Computed results demonstrate how strongly the vaporization Damköhler number impacts on the type of primary homogeneous flame formed and on the possible existence of multiple flame sheets as the flow field oscillates. In addition, isolated regions of high fuel vapor concentrations are produced by fuel droplet enrichment. The presence of resulting parallel fluctuating thermal fields indicates a potential impact on undesirable pollutants production.

AB - The sensitivity to the vaporization Damköhler number of the behavior of a coflow laminar spray diffusion flame in an oscillating flow field is investigated. Droplet grouping induced by the host gas flow oscillations is accounted for, and its effect is described through a specially constructed model for the vaporization Damköhler number that responds to the proximity of the droplets as they cluster. A formal analytical solution is developed, and the dynamics of the spray flame front shapes and thermal fields are deduced. Computed results demonstrate how strongly the vaporization Damköhler number impacts on the type of primary homogeneous flame formed and on the possible existence of multiple flame sheets as the flow field oscillates. In addition, isolated regions of high fuel vapor concentrations are produced by fuel droplet enrichment. The presence of resulting parallel fluctuating thermal fields indicates a potential impact on undesirable pollutants production.

KW - Droplet grouping

KW - Modeling

KW - Spray combustion

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U2 - 10.1080/00102202.2013.764288

DO - 10.1080/00102202.2013.764288

M3 - Article

AN - SCOPUS:84878299807

SN - 0010-2202

VL - 185

SP - 898

EP - 919

JO - Combustion Science and Technology

JF - Combustion Science and Technology

IS - 6

ER -

Vaporization Damköhler number and enrichment effects in spray diffusion flames in an oscillating flow field

Abstract

Keywords

ASJC Scopus subject areas

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