TY - JOUR
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 -