Analysis of entropy generation in counter-flow premixed hydrogen-air combustion

Sheng Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

In this paper, entropy generation in counter-flow premixed hydrogen-air combustion confined by planar opposing jets is investigated for the first time. The effects of the equivalence ratio and the inlet Reynolds number (corresponding to the global stretch rate) on entropy generation are studied by numerical evaluating the entropy generation equation. The lattice Boltzmann model proposed in our previous work, instead of traditional numerical methods, is used to solve the governing equations for combustion process. Through the present study, three interesting features of this kind of combustion, which are quite different from that reported in previous literature on entropy generation analysis for reactive flows, are revealed. Moreover, it is observed that the whole investigated domain can be divided into two parts according to the predominant irreversibilities. The total entropy generation number can be approximated as a linear increasing function of the equivalence ratio and the inlet Reynolds number for all the cases under the present study.
Original languageEnglish
Pages (from-to)1401-1411
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number3
Early online date8 Dec 2009
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

Keywords

  • Entropy generation
  • Lattice Boltzmann method
  • Premixed hydrogen-air combustion
  • Second law analysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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