Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14171
Title: Effects of nozzle length on flame and emission behaviors of multi-fuel-jet inverse diffusion flame burner
Authors: Zhen, HS
Choy, YS 
Leung, CW 
Cheung, CS 
Keywords: Air/LPG combustion
Burner design
CO/CO 2 emissions
Flame noise radiation
Inverse diffusion flame
Issue Date: 2011
Publisher: Pergamon Press
Source: Applied energy, 2011, v. 88, no. 9, p. 2917-2924 How to cite?
Journal: Applied energy 
Abstract: An experimental study was performed to investigate the effects of the nozzle length on the air-pollutant-emission and noise-radiation behaviors of a burner utilizing a multi-fuel-jet inverse diffusion flame (MIDF). Comparison of the experimental results obtained from two MIDF burners, one with a long nozzle and the other with a short nozzle, operating under the same air/fuel supply conditions (Re air and F{cyrillic}) shows rather significant differences in the flame appearance, flame centerline temperature, CO/CO 2 concentrations and the noise radiation. The nozzle length influences development of the jets and hence interaction between the air/fuel jets including their mixing process. The short nozzle produces a flame with a shorter base height and a smaller potential core due to the enhanced air/fuel mixing. It also leads to faster and more complete combustion at the inner reaction cone of the flame due to the stronger and faster air/fuel mixing. The nozzle length affects the CO and CO 2 concentrations, and higher peak values are obtained with the short-nozzle flame. Flame noise of the MIDF is defined as the noise radiation at different flame heights, which is of varying strength but of the same dominant frequency in the range of 250-700Hz. The noise radiation from the inner reaction cone of the flame is stronger than that from the lower and upper parts of the flame, and the maximum noise radiation occurs when the total amounts of air and fuel in the combustion zone are at the stoichiometric air/fuel ratio. For all the experiments conducted in the present study, the MIDF produced by the long nozzle is always noisier than its counterpart and it is due to the increase of the low-frequency noise components.
URI: http://hdl.handle.net/10397/14171
ISSN: 0306-2619
EISSN: 1872-9118
DOI: 10.1016/j.apenergy.2011.02.040
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

15
Last Week
0
Last month
0
Citations as of Sep 10, 2017

WEB OF SCIENCETM
Citations

15
Last Week
0
Last month
0
Citations as of Sep 13, 2017

Page view(s)

47
Last Week
1
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.