Measurement of the spatially distributed temperature and soot loadings in a laminar diffusion flame using a Cone-Beam Tomography technique

Zhao, Huayong; Williams, B. A. O.; Stone, Richard

doi:10.1016/j.jqsrt.2013.07.024

Cited by 16 publications

(10 citation statements)

References 29 publications

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“…Reconstructed red pixel value, temperature, soot diameter and soot volume fraction distributions in the central plane of the pure ethylene flame (regions between two white lines are a low signal region) [9] These plots show unexpected noise and artefacts, viz. lumpy patterns and vertical stripes.…”

Section: Figmentioning

confidence: 95%

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Investigation of the Soot Formation in Ethylene Laminar Diffusion Flames When Diluted with Helium or Supplemented by Hydrogen

2014

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A new optical diagnostic technique has been used to measure the spatially distributed temperatures, soot diameters, and soot volume fractions in several different ethylene laminar diffusion flames to investigate the effect of adding hydrogen and helium on the soot formation. The test results show that adding hydrogen increases the flame temperature in all regions, while adding helium does not significantly affect the flame temperature in the reaction region but does increase the flame temperature elsewhere. The flame heights when adding helium and hydrogen can be calculated using the correlation introduced by Roper if the ethylene diffusion coefficient is used. This indicates that the flame height is determined by the diffusion of ethylene molecules when the hydrogen fraction is below 20%. It was also found that either adding helium or hydrogen does not significantly affect the soot diameter but does reduce the soot volume fraction. A total of 20% of helium addition by volume was measured to reduce the total soot number by 19%, while a total of 20% of hydrogen addition reduced the total soot number by 23%. In comparison, replacing the hydrocarbon with hydrogen is much more effective in reducing soot formation. Replacement of 25% ethylene by hydrogen was measured to reduce the total soot number by 66%. Apart from demonstrating the influence of hydrogen and helium on ethylene diffusion flames, these measurements provide additional data for modelers of diffusion flames, especially those with an interest in the formation of particulate matter.

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Section: Figmentioning

confidence: 95%

“…(3*RG: tripled Redto-Green ratio; RB: Red-to-Blue ratio) [9] In order to make comparisons between the measured flames, two kinds of diagram proved useful:…”

Section: Figmentioning

confidence: 99%

Investigation of the Soot Formation in Ethylene Laminar Diffusion Flames When Diluted with Helium or Supplemented by Hydrogen

2014

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“…Indeed, the present setup will be added a third laser beam operating at a wavelength that is sensitive to light diffusion, i.e. to particle size [36]. Thus, the database will be complemented by the fields of mean soot particle diameter, a crucial information that will especially remove the uncertainty associated with the speculated trends on soot growth rates.…”

Section: And 7)mentioning

confidence: 99%

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

Wang

Legros

Bonnety

et al. 2017

Combustion and Flame

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, et al.. Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames. Combustion and Flame, Elsevier, 2017, 183, pp.242-252. <10.1016/j.combustflame.2017 over a wide range of CO 2 replacement of N 2 in the coflowing oxidizer stream, it can be considered a distinct characteristic for the assessment of numerical simulations incorporating soot formation and oxidation models. As an original database, the concomitantly measured soot temperature and volume fraction distributions are attached to the present paper as supplemental materials, thus documenting the aforementioned transitions for the whole range of CO 2 content of the coflow investigated.

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“…Over the past few years, a number of techniques have been developed to reconstruct the 3-D flame temperature [1][2][12][13][14][15][16][17][18][19][20][21][22][23][24]. They are mainly categorized into laser-based diagnostics [1,2,12], acoustic techniques [13] and image-based techniques [14-Error!…”

Section: Introductionmentioning

confidence: 99%

Investigation of flame radiation sampling and temperature measurement through light field camera

Sun

Hossain²,

et al. 2018

International Journal of Heat and Mass Transfer

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Measurement of the spatially distributed temperature and soot loadings in a laminar diffusion flame using a Cone-Beam Tomography technique

Cited by 16 publications

References 29 publications

Investigation of the Soot Formation in Ethylene Laminar Diffusion Flames When Diluted with Helium or Supplemented by Hydrogen

Investigation of the Soot Formation in Ethylene Laminar Diffusion Flames When Diluted with Helium or Supplemented by Hydrogen

Experimental assessment of the sudden-reversal of the oxygen dilution effect on soot production in coflow ethylene flames

Investigation of flame radiation sampling and temperature measurement through light field camera

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