Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions

Dongxiao Zhao; Chi Zhang; Francisco Hernandez Perez; Hong G. Im; Lipo Wang

doi:10.1016/j.proci.2022.09.018

Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions

Dongxiao Zhao, Chi Zhang, Francisco Hernandez Perez, Hong G. Im, Lipo Wang

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

5 Scopus citations

Abstract

A premixed H2/air flame impinging onto a flat surface in statistically stationary state is studied for both reactive and inert wall cases to gain insights into the effects of the heterogeneous surface reactions. Direct numerical simulation (DNS) results with detailed gas-phase chemistry and surface adsorption and desorption mechanisms indicate differences in the flame front topology and near-wall flame dynamics between these two cases. In the reactive surface case, gas-phase free radicals are inclined to be adsorbed with much reduced near-wall concentration. Consequently, the gas-phase heat release rate (HRR) close to the wall decreases as well because of the low availability of free radicals. However, extra heat released from the reactive surface partially compensates for such difference. Moreover, wall reactions will intensify the turbulent fluctuations of the wall temperature and wall heat flux, while for these two cases the mean temperature profile along the flame propagating direction remains similar.

Original language	English (US)
Journal	Proceedings of the Combustion Institute
DOIs	https://doi.org/10.1016/j.proci.2022.09.018
State	Published - Oct 19 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-10-21
Acknowledgements: LW thanks for the computational support from the Center for High Performance Computing at Shanghai Jiao Tong University. FEHP and HGI were sponsored by King Abdullah University of Science and Technology (KAUST).

ASJC Scopus subject areas

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

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10.1016/j.proci.2022.09.018

https://repository.kaust.edu.sa/bitstream/10754/685047/1/Zhao_etal_2022_heterogeneous_surface_reactions_flame_wall_interaction.pdf

Cite this

@article{d660ee2863194a3889f55bcba532b563,

title = "Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions",

abstract = "A premixed H2/air flame impinging onto a flat surface in statistically stationary state is studied for both reactive and inert wall cases to gain insights into the effects of the heterogeneous surface reactions. Direct numerical simulation (DNS) results with detailed gas-phase chemistry and surface adsorption and desorption mechanisms indicate differences in the flame front topology and near-wall flame dynamics between these two cases. In the reactive surface case, gas-phase free radicals are inclined to be adsorbed with much reduced near-wall concentration. Consequently, the gas-phase heat release rate (HRR) close to the wall decreases as well because of the low availability of free radicals. However, extra heat released from the reactive surface partially compensates for such difference. Moreover, wall reactions will intensify the turbulent fluctuations of the wall temperature and wall heat flux, while for these two cases the mean temperature profile along the flame propagating direction remains similar.",

author = "Dongxiao Zhao and Chi Zhang and {Hernandez Perez}, Francisco and Im, {Hong G.} and Lipo Wang",

note = "KAUST Repository Item: Exported on 2022-10-21 Acknowledgements: LW thanks for the computational support from the Center for High Performance Computing at Shanghai Jiao Tong University. FEHP and HGI were sponsored by King Abdullah University of Science and Technology (KAUST).",

year = "2022",

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doi = "10.1016/j.proci.2022.09.018",

language = "English (US)",

journal = "Proceedings of the Combustion Institute",

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T1 - Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions

AU - Zhao, Dongxiao

AU - Zhang, Chi

AU - Hernandez Perez, Francisco

AU - Im, Hong G.

AU - Wang, Lipo

N1 - KAUST Repository Item: Exported on 2022-10-21 Acknowledgements: LW thanks for the computational support from the Center for High Performance Computing at Shanghai Jiao Tong University. FEHP and HGI were sponsored by King Abdullah University of Science and Technology (KAUST).

PY - 2022/10/19

Y1 - 2022/10/19

N2 - A premixed H2/air flame impinging onto a flat surface in statistically stationary state is studied for both reactive and inert wall cases to gain insights into the effects of the heterogeneous surface reactions. Direct numerical simulation (DNS) results with detailed gas-phase chemistry and surface adsorption and desorption mechanisms indicate differences in the flame front topology and near-wall flame dynamics between these two cases. In the reactive surface case, gas-phase free radicals are inclined to be adsorbed with much reduced near-wall concentration. Consequently, the gas-phase heat release rate (HRR) close to the wall decreases as well because of the low availability of free radicals. However, extra heat released from the reactive surface partially compensates for such difference. Moreover, wall reactions will intensify the turbulent fluctuations of the wall temperature and wall heat flux, while for these two cases the mean temperature profile along the flame propagating direction remains similar.

AB - A premixed H2/air flame impinging onto a flat surface in statistically stationary state is studied for both reactive and inert wall cases to gain insights into the effects of the heterogeneous surface reactions. Direct numerical simulation (DNS) results with detailed gas-phase chemistry and surface adsorption and desorption mechanisms indicate differences in the flame front topology and near-wall flame dynamics between these two cases. In the reactive surface case, gas-phase free radicals are inclined to be adsorbed with much reduced near-wall concentration. Consequently, the gas-phase heat release rate (HRR) close to the wall decreases as well because of the low availability of free radicals. However, extra heat released from the reactive surface partially compensates for such difference. Moreover, wall reactions will intensify the turbulent fluctuations of the wall temperature and wall heat flux, while for these two cases the mean temperature profile along the flame propagating direction remains similar.

UR - http://hdl.handle.net/10754/685047

UR - https://linkinghub.elsevier.com/retrieve/pii/S1540748922003820

U2 - 10.1016/j.proci.2022.09.018

DO - 10.1016/j.proci.2022.09.018

M3 - Article

SN - 1540-7489

JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

ER -

Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions

Abstract

Bibliographical note

ASJC Scopus subject areas

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