Turbulent flame–wall interaction: a direct numerical simulation study

doi:https://doi.org/10.1017/s0022112010001278

Title: Turbulent flame–wall interaction: a direct numerical simulation study

Abstract

A turbulent flame–wall interaction (FWI) configuration is studied using three-dimensional direct numerical simulation (DNS) and detailed chemical kinetics. The simulations are used to investigate the effects of the wall turbulent boundary layer (i) on the structure of a hydrogen–air premixed flame, (ii) on its near-wall propagation characteristics and (iii) on the spatial and temporal patterns of the convective wall heat flux. Results show that the local flame thickness and propagation speed vary between the core flow and the boundary layer, resulting in a regime change from flamelet near the channel centreline to a thickened flame at the wall. This finding has strong implications for the modelling of turbulent combustion using Reynolds-averaged Navier–Stokes or large-eddy simulation techniques. Moreover, the DNS results suggest that the near-wall coherent turbulent structures play an important role on the convective wall heat transfer by pushing the hot reactive zone towards the cold solid surface. At the wall, exothermic radical recombination reactions become important, and are responsible for approximately 70% of the overall heat release rate at the wall. Spectral analysis of the convective wall heat flux provides an unambiguous picture of its spatial and temporal patterns, previously unobserved, that is directly related to the spatial andmore »« less

Authors:: GRUBER, A.; SANKARAN, R.; HAWKES, E. R.; CHEN, J. H.

Publication Date:: 2010-08-19

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF), Oak Ridge, TN (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1564679

DOE Contract Number:: AC05-00OR22725

Resource Type:: Journal Article

Journal Name:: Journal of Fluid Mechanics

Additional Journal Information:: Journal Volume: 658; Journal ID: ISSN 0022-1120

Publisher:: Cambridge University Press

Country of Publication:: United States

Language:: English

Subject:: Mechanics; Physics

Citation Formats


                    GRUBER, A., SANKARAN, R., HAWKES, E. R., and CHEN, J. H. Turbulent flame–wall interaction: a direct numerical simulation study.  United States: N. p., 2010. 
        Web.  doi:10.1017/s0022112010001278.

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                    GRUBER, A., SANKARAN, R., HAWKES, E. R., & CHEN, J. H. Turbulent flame–wall interaction: a direct numerical simulation study.  United States.  https://doi.org/10.1017/s0022112010001278

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                    GRUBER, A., SANKARAN, R., HAWKES, E. R., and CHEN, J. H. Thu .  
        "Turbulent flame–wall interaction: a direct numerical simulation study".  United States.  https://doi.org/10.1017/s0022112010001278.

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@article{osti_1564679,

  title        = {Turbulent flame–wall interaction: a direct numerical simulation study},

  author       = {GRUBER, A. and SANKARAN, R. and HAWKES, E. R. and CHEN, J. H.},

  abstractNote = {A turbulent flame–wall interaction (FWI) configuration is studied using three-dimensional direct numerical simulation (DNS) and detailed chemical kinetics. The simulations are used to investigate the effects of the wall turbulent boundary layer (i) on the structure of a hydrogen–air premixed flame, (ii) on its near-wall propagation characteristics and (iii) on the spatial and temporal patterns of the convective wall heat flux. Results show that the local flame thickness and propagation speed vary between the core flow and the boundary layer, resulting in a regime change from flamelet near the channel centreline to a thickened flame at the wall. This finding has strong implications for the modelling of turbulent combustion using Reynolds-averaged Navier–Stokes or large-eddy simulation techniques. Moreover, the DNS results suggest that the near-wall coherent turbulent structures play an important role on the convective wall heat transfer by pushing the hot reactive zone towards the cold solid surface. At the wall, exothermic radical recombination reactions become important, and are responsible for approximately 70% of the overall heat release rate at the wall. Spectral analysis of the convective wall heat flux provides an unambiguous picture of its spatial and temporal patterns, previously unobserved, that is directly related to the spatial and temporal characteristic scalings of the coherent near-wall turbulent structures.},

  doi          = {10.1017/s0022112010001278},

  url          = {https://www.osti.gov/biblio/1564679},
  journal      = {Journal of Fluid Mechanics},

  issn         = {0022-1120},

  number       = ,

  volume       = 658,

  place        = {United States},

  year         = {2010},

  month        = {8}

}

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Title: Turbulent flame–wall interaction: a direct numerical simulation study

Abstract

Citation Formats

The effect of flame structure on soot formation and transport in turbulent nonpremixed flames using direct numerical simulation journal, October 2007

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Physical and numerical realizability requirements for flame surface density approaches journal, December 2001

Surface heat-flux fluctuations in a turbulent channel flow up to Reτ=1020 with Pr=0.025 and 0.71 journal, June 2004

Direct numerical simulation of autoignition in non-homogeneous hydrogen-air mixtures journal, August 2003

Comparison of direct numerical simulation of lean premixed methane–air flames with strained laminar flame calculations journal, January 2006

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Evidence of very long meandering features in the logarithmic region of turbulent boundary layers journal, May 2007

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Analysis of wall heat fluxes, reaction mechanisms, and unburnt hydrocarbons during the head-on quenching of a laminar methane flame journal, February 1997

A Study of the Laminar Flame Tip and Implications for Premixed Turbulent Combustion journal, January 1992

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Boundary conditions for direct simulations of compressible viscous flows journal, July 1992

Turbulent combustion modelling journal, January 1988

Propagation velocity of perturbations in turbulent channel flow journal, March 1993

Analysis of the contribution of curvature to premixed flame propagation journal, July 1999

The minimal flow unit in near-wall turbulence journal, April 1991

Direct numerical simulation of turbulent channel flow up to Reτ=590 journal, April 1999

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Direct measurement of laminar flame quenching distance in a closed vessel journal, March 2003

Flashback in a Swirl Burner With Cylindrical Premixing Zone journal, April 2004

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Large-scale influences in near-wall turbulence journal, January 2007

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The effect of flame structure on soot formation and transport in turbulent nonpremixed flames using direct numerical simulation
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Direct numerical simulation of autoignition in non-homogeneous hydrogen-air mixtures
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Comparison of direct numerical simulation of lean premixed methane–air flames with strained laminar flame calculations
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Evidence of very long meandering features in the logarithmic region of turbulent boundary layers
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Analysis of wall heat fluxes, reaction mechanisms, and unburnt hydrocarbons during the head-on quenching of a laminar methane flame
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A Study of the Laminar Flame Tip and Implications for Premixed Turbulent Combustion
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Terascale direct numerical simulations of turbulent combustion using S3D
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Boundary conditions for direct simulations of compressible viscous flows
journal, July 1992

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journal, January 1988

Propagation velocity of perturbations in turbulent channel flow
journal, March 1993

Analysis of the contribution of curvature to premixed flame propagation
journal, July 1999

The minimal flow unit in near-wall turbulence
journal, April 1991

Direct numerical simulation of turbulent channel flow up to Reτ=590
journal, April 1999

Flame-wall interaction simulation in a turbulent channel flow
journal, October 1996

A numerical study of laminar flame wall quenching
journal, January 1981

Direct measurement of laminar flame quenching distance in a closed vessel
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Flashback in a Swirl Burner With Cylindrical Premixing Zone
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Fine Structure of Scalar Fields Mixed by Turbulence. I. Zero-Gradient Points and Minimal Gradient Surfaces
journal, January 1968

On the structure of wall-bounded turbulent flows
journal, January 1983

Turbulence statistics in fully developed channel flow at low Reynolds number
journal, April 1987

Improved boundary conditions for viscous, reacting, compressible flows
journal, November 2003

Turbulent combustion modeling
journal, March 2002

Large-scale influences in near-wall turbulence
journal, January 2007

On the generation of turbulent wall friction
journal, February 1994

An updated comprehensive kinetic model of hydrogen combustion
journal, January 2004

DNS of a premixed turbulent V flame and LES of a ducted flame using a FSD-PDF subgrid scale closure with FPI-tabulated chemistry
journal, December 2005

The evolution of surfaces in turbulence
journal, January 1988

Direct simulation and modeling of flame-wall interaction for premixed turbulent combustion☆
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