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Numerical study of bluff-body non-premixed flame structures using laminar flamelet model
journal contribution
posted on 2009-12-21, 12:10 authored by Mamdud Hossain, Weeratunge MalalasekeraWeeratunge MalalasekeraA laminar flamelet model is applied for bluff-body stabilized flames to study the flow
field, mixing pattern, and the flame structure at two different velocities. The k 1 turbulence
model is applied for accounting the turbulence fluctuations. It is found that the recirculation
zone dominates the near field, while the far field structure is similar to the jet flow. The intermediate
neck zone is the intense mixing region. The computation shows that the fuel jet velocity
has significant effect on the structure of the flow field, which in turn has significant effect on the
combustion characteristics. The laminar flamelet model is found to be adequate for simulating
the temperature and the flame composition inside the recirculation zone. The flamelet model
has, however, failed to account for the local extinction in the neck zone. Possible limitation of
the laminar flamelet model to predict the local extinction is discussed.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
HOSSAIN, M. and MALALASEKERA, W., 2005. Numerical study of bluff-body non-premixed flame structures using laminar flamelet model. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 219 (5), pp. 361-370Publisher
Professional Engineering Publishing / © IMechEVersion
- VoR (Version of Record)
Publication date
2005Notes
This is an article from the journal, Proceedings of the IMechE, Part A: Journal of Power and Energy [© IMechE ]. It is also available at: http://journals.pepublishing.com/content/u14769311q0l680j/ISSN
0957-6509Language
- en