THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Fuhua Jiang

,

Guipin Cao

,

Yan Zhang

FLAME CHARACTERISTICS INFLUENCED BY THE ANGLE OF BURNERS FOR NON-PREMIXED C3H8/AIR

ABSTRACT
The study of micro flame characteristics is an essential basis for developing micro combustors. Therefore, the non-premixed C3H8-air micro flame characteristics were experimentally studied. Flame length, flame shape, and blow-out limit were studied by varying the equivalence ratio, Ф, the inlet velocity of C3H8-air, v, and angles of the burner. The results showed ignited non-premixed C3H8-air had three combustion states: no flame, a stable flame, and a blow-out flame. Whether ignited non-premixed C3H8-air could form a stable flame mainly depended on Ф and v. In addition, total flame lengths increased with the increase of Ф and v firstly. However, when Ф increased to a certain value, total flame lengths were independent of Ф and only affected by v. Moreover, flame length and shape were affected by the angle of the burner. Instead, the blow-out limit was found to be associated solely with Ф, but not the burner angle. The findings of this study provided fundamental data for the development of high-efficiency micro combustors.
KEYWORDS
Blow-out limit, flame stability, flame shape, flame length, non-premixed flame
PAPER SUBMITTED: 2022-03-01
PAPER REVISED: 2022-04-22
PAPER ACCEPTED: 2022-04-26
PUBLISHED ONLINE: 2022-07-09
DOI REFERENCE: https://doi.org/10.2298/TSCI220301095J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [5147 - 5156]
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Flame characteristics influenced by the angle of burners for non-premixed C3H8/air

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence