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 language | English |
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Pages (from-to) | 1401-1411 |
Number of pages | 11 |
Journal | International Journal of Hydrogen Energy |
Volume | 35 |
Issue number | 3 |
Early online date | 8 Dec 2009 |
DOIs | |
Publication status | Published - Feb 2010 |
Externally published | Yes |
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