Heat transfer and flame stabilization of laminar premixed flames anchored to a heat-flux burner

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Measurement of the burning velocity of unstretched laminar hydrogen/air premixed flames suffers from large uncertainties owing to the highly diffusive nature of hydrogen that can give rise to flame instability. This paper reports on a numerical study of the structures and stability of laminar premixed CH4/O2/CO2 flames and H2/O2/N2 flames anchored to a heat-flux burner using a high-order numerical method with detailed chemical kinetic mechanisms and detailed transport properties. The aim is to elucidate the effect of the flow and temperature inhomogeneity generated by the burner plate holes on flame structures and burning velocity. Heat transfer flux between the burner plate and the surrounding gaseous mixture is investigated under various standoff distances and burner plate temperatures. The burning velocity and the detailed flow, temperature and species distributions in flames with a zero net heat flux between the flames and the burner plate are analyzed. It is found that for the methane flames, when the standoff distance is sufficiently small, the burner can essentially suppress the intrinsic flame instability, but the plate holes can give rise to flame wrinkles of the size of the holes. At high standoff distances, the non-uniformity of the flow from the burner plate holes has a minor effect on the flame surface wrinkling; however, large-scale cellular structures can appear on the flame surface due to intrinsic flame instability. For the studied methane flames the effect of non-uniformity of the flow from the burner plate holes on the burning velocity is fairly small. For the studied hydrogen flames the burner plate could not totally suppress the intrinsic flame instability. The intrinsic flame instability can give rise to a significant increase in the flame surface area and mean burning velocity, with more than 25% increase in the burning velocity.

LanguageEnglish
Pages2037-2051
Number of pages15
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number3
DOIs
StatePublished - 21 Jan 2016

Fingerprint

premixed flames
burners
Fuel burners
Heat flux
heat flux
flames
Stabilization
stabilization
heat transfer
Heat transfer
Hydrogen
Methane
nonuniformity
Reaction kinetics
Transport properties
Temperature
hydrogen
Numerical methods
methane
wrinkling

Keywords

  • Burner non-uniformity
  • Cellular flames
  • Heat-flux burner
  • Intrinsic instability
  • Laminar premixed flame
  • Numerical simulation

Cite this

@article{7c65c4464da04b30929ca0f2e3400dcb,
title = "Heat transfer and flame stabilization of laminar premixed flames anchored to a heat-flux burner",
abstract = "Measurement of the burning velocity of unstretched laminar hydrogen/air premixed flames suffers from large uncertainties owing to the highly diffusive nature of hydrogen that can give rise to flame instability. This paper reports on a numerical study of the structures and stability of laminar premixed CH4/O2/CO2 flames and H2/O2/N2 flames anchored to a heat-flux burner using a high-order numerical method with detailed chemical kinetic mechanisms and detailed transport properties. The aim is to elucidate the effect of the flow and temperature inhomogeneity generated by the burner plate holes on flame structures and burning velocity. Heat transfer flux between the burner plate and the surrounding gaseous mixture is investigated under various standoff distances and burner plate temperatures. The burning velocity and the detailed flow, temperature and species distributions in flames with a zero net heat flux between the flames and the burner plate are analyzed. It is found that for the methane flames, when the standoff distance is sufficiently small, the burner can essentially suppress the intrinsic flame instability, but the plate holes can give rise to flame wrinkles of the size of the holes. At high standoff distances, the non-uniformity of the flow from the burner plate holes has a minor effect on the flame surface wrinkling; however, large-scale cellular structures can appear on the flame surface due to intrinsic flame instability. For the studied methane flames the effect of non-uniformity of the flow from the burner plate holes on the burning velocity is fairly small. For the studied hydrogen flames the burner plate could not totally suppress the intrinsic flame instability. The intrinsic flame instability can give rise to a significant increase in the flame surface area and mean burning velocity, with more than 25{\%} increase in the burning velocity.",
keywords = "Burner non-uniformity, Cellular flames, Heat-flux burner, Intrinsic instability, Laminar premixed flame, Numerical simulation",
author = "Yu, {J. F.} and R. Yu and Bai, {X. S.} and Bastiaans, {R. J. M.} and {Van Oijen}, {J. A.} and {De Goey}, {L. P. H.}",
year = "2016",
month = "1",
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language = "English",
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pages = "2037--2051",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
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Heat transfer and flame stabilization of laminar premixed flames anchored to a heat-flux burner. / Yu, J. F.; Yu, R.; Bai, X. S.; Bastiaans, R. J. M.; Van Oijen, J. A.; De Goey, L. P. H.

In: International Journal of Hydrogen Energy, Vol. 41, No. 3, 21.01.2016, p. 2037-2051.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Heat transfer and flame stabilization of laminar premixed flames anchored to a heat-flux burner

AU - Yu,J. F.

AU - Yu,R.

AU - Bai,X. S.

AU - Bastiaans,R. J. M.

AU - Van Oijen,J. A.

AU - De Goey,L. P. H.

PY - 2016/1/21

Y1 - 2016/1/21

N2 - Measurement of the burning velocity of unstretched laminar hydrogen/air premixed flames suffers from large uncertainties owing to the highly diffusive nature of hydrogen that can give rise to flame instability. This paper reports on a numerical study of the structures and stability of laminar premixed CH4/O2/CO2 flames and H2/O2/N2 flames anchored to a heat-flux burner using a high-order numerical method with detailed chemical kinetic mechanisms and detailed transport properties. The aim is to elucidate the effect of the flow and temperature inhomogeneity generated by the burner plate holes on flame structures and burning velocity. Heat transfer flux between the burner plate and the surrounding gaseous mixture is investigated under various standoff distances and burner plate temperatures. The burning velocity and the detailed flow, temperature and species distributions in flames with a zero net heat flux between the flames and the burner plate are analyzed. It is found that for the methane flames, when the standoff distance is sufficiently small, the burner can essentially suppress the intrinsic flame instability, but the plate holes can give rise to flame wrinkles of the size of the holes. At high standoff distances, the non-uniformity of the flow from the burner plate holes has a minor effect on the flame surface wrinkling; however, large-scale cellular structures can appear on the flame surface due to intrinsic flame instability. For the studied methane flames the effect of non-uniformity of the flow from the burner plate holes on the burning velocity is fairly small. For the studied hydrogen flames the burner plate could not totally suppress the intrinsic flame instability. The intrinsic flame instability can give rise to a significant increase in the flame surface area and mean burning velocity, with more than 25% increase in the burning velocity.

AB - Measurement of the burning velocity of unstretched laminar hydrogen/air premixed flames suffers from large uncertainties owing to the highly diffusive nature of hydrogen that can give rise to flame instability. This paper reports on a numerical study of the structures and stability of laminar premixed CH4/O2/CO2 flames and H2/O2/N2 flames anchored to a heat-flux burner using a high-order numerical method with detailed chemical kinetic mechanisms and detailed transport properties. The aim is to elucidate the effect of the flow and temperature inhomogeneity generated by the burner plate holes on flame structures and burning velocity. Heat transfer flux between the burner plate and the surrounding gaseous mixture is investigated under various standoff distances and burner plate temperatures. The burning velocity and the detailed flow, temperature and species distributions in flames with a zero net heat flux between the flames and the burner plate are analyzed. It is found that for the methane flames, when the standoff distance is sufficiently small, the burner can essentially suppress the intrinsic flame instability, but the plate holes can give rise to flame wrinkles of the size of the holes. At high standoff distances, the non-uniformity of the flow from the burner plate holes has a minor effect on the flame surface wrinkling; however, large-scale cellular structures can appear on the flame surface due to intrinsic flame instability. For the studied methane flames the effect of non-uniformity of the flow from the burner plate holes on the burning velocity is fairly small. For the studied hydrogen flames the burner plate could not totally suppress the intrinsic flame instability. The intrinsic flame instability can give rise to a significant increase in the flame surface area and mean burning velocity, with more than 25% increase in the burning velocity.

KW - Burner non-uniformity

KW - Cellular flames

KW - Heat-flux burner

KW - Intrinsic instability

KW - Laminar premixed flame

KW - Numerical simulation

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U2 - 10.1016/j.ijhydene.2015.11.105

DO - 10.1016/j.ijhydene.2015.11.105

M3 - Article

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EP - 2051

JO - International Journal of Hydrogen Energy

T2 - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 3

ER -