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Numerical simulation of properties of a LPG flame with high-temperature air
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.ORCID iD: 0000-0002-1837-5439
2005 (English)In: International journal of thermal sciences, ISSN 1290-0729, Vol. 44, no 10, 973-985 p.Article in journal (Refereed) Published
Abstract [en]

This work is connected with properties of a flame obtained by combustion of liquified propane gas (LPG) with highly preheated air using a regenerative burner. The attention is focused on both the size and shape of the flame and the results were obtained in a semi-industrial furnace equipped with a regenerative burner system. Results of the CFD-based mathematical modeling have been compared with measurements of a number of parameters including the furnace-wall temperature and the concentrations of gaseous species in the furnace. The results indicate that the flame spread can be well predicted using the numerical model. A flame entrainment ratio has been proposed here for describing and classifying the physical changes of the flame shape. This ratio can be used to optimize the diameter and length of a combustion chamber for specific applications. It is also found that equipping a furnace with a regenerative burner can provide a high saving energy, a larger flame volume and a lower emission of NO. It has been obtained that a lower excess air ratio leads to a low peak temperature and a larger flame volume, thus a lower NO emission.

Place, publisher, year, edition, pages
2005. Vol. 44, no 10, 973-985 p.
Keyword [en]
high-temperature air combustion, flame, regenerative burner, numerical simulation, NO emission, mild combustion, preheated air, oxygen-concentration, regenerative burner, industrial furnace, nox emissions, oxidation, fuels, co
URN: urn:nbn:se:kth:diva-15038DOI: 10.1016/j.ijthermalsci.2005.03.001ISI: 000231832300007ScopusID: 2-s2.0-23344432472OAI: diva2:333079
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Yang, Weihong
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