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 journalArticlepeer-review

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 languageEnglish (US)
JournalProceedings of the Combustion Institute
DOIs
StatePublished - Oct 19 2022

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Turbulent premixed hydrogen/air flame-wall interaction with heterogeneous surface reactions'. Together they form a unique fingerprint.

Cite this