Characterization of the three-dimensional flame-holding mechanism in an industrial oil burner with stereoscopic particle image velocimetry

Citation
Vr. Palero et Y. Ikeda, Characterization of the three-dimensional flame-holding mechanism in an industrial oil burner with stereoscopic particle image velocimetry, J TURBUL, 2, 2001, pp. 1-12
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics,"Mechanical Engineering
Journal title
JOURNAL OF TURBULENCE
ISSN journal
1468-5248 → ACNP
Volume
2
Year of publication
2001
Pages
1 - 12
Database
ISI
SICI code
1468-5248(20011126)2:<1:COTTFM>2.0.ZU;2-#
Abstract
The three-dimensional flame-holding mechanism in a gun-type burner has been investigated, as well as the fuel droplet dynamics. This gun-type burner f orms a recirculating swirling flow with a complex structure, essential for understanding the flame-holding mechanism. The swirl flow will increase fue l air mixing, improve flame stabilization, and prevent flame attachment on the baffle plate. The central plane of the burner has been analysed in reacting and non-react ing conditions by means of stereoscopic particle image velocimetry. This te chnique allows the measurement of the full three-dimensional velocity vecto r map in a fluid plane. A complex swirl motion has been found for the react ing condition, with the formation of a couple of twin vortexes in the shear flow region that surrounds the recirculation areas. The influence of chang ing the airflow rate (lambda) has been studied. The strongest effect found concerns the axial and radial components, while the swirl component is hard ly influenced.