THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Bo Lou

,

Eric Hu

,

Ye Wang

ASSOCIATION OF FLAME-OSCILLATION FREQUENCY UNDER CROSS WIND DIFFUSION

ABSTRACT
Turbulent flame-oscillation frequency and combustion efficiency are the important parameters in combustion. It is a useful study to judge combustion efficiency by intuitive flame frequency. Based on a combustion wind tunnel experimental setup, the variation law of combustion 9 flame-oscillation frequency and combustion efficiency using external wind speeds was studied via the color flames image sequence of oil pan combustion and flue gas composition. The oscillation frequency was calculated with the upper edge of the fire plume which recorded flame image sequence using a high-speed video, combined the MATLimage processing technique. The combustion efficiency was calculated combined with the C and H element mass of the liquid fuel in the oil pool and CO2 and H2O concentrations in the flue gas. The results show that the oscillation frequency of the flame revealed a tendency to increase followed by a decrease with increasing wind speed, while the overall trend of combustion efficiency increased first and then decreased. The combustion efficiency could be judged by observing the oscillation frequency of the flame image. In addition, the combustion efficiency may ensure in right way when the turbulence oscillation frequency of the oil pan flame ranged between 15 HZ and 18 HZ
KEYWORDS
crosswind, combustion characteristics, flame-oscillation frequency, combustion efficiency, flame image
PAPER SUBMITTED: 2018-04-26
PAPER REVISED: 2019-06-10
PAPER ACCEPTED: 2019-06-24
PUBLISHED ONLINE: 2019-07-06
DOI REFERENCE: https://doi.org/10.2298/TSCI180426280L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 6, PAGES [3965 - 3974]
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Association of flame-oscillation frequency under cross wind diffusion

© 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