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http://dx.doi.org/10.3795/KSME-B.2002.26.1.125

Characteristics of Turbulent Nonpremixed Jet Flame in Cross Air Flow  

Lee, Kee-Man (전남도립담양대학 기계공학과)
Park, Jeong (순천대학교 기계자동차공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.1, 2002 , pp. 125-132 More about this Journal
Abstract
An experimental study on the characteristics of stability of propane turbulent nonpremixed jet flames discharged normal to air free-streams with uniform velocity profile is conducted. Experimental observations are focused on the flame shape, the stability considering two kinds of flame, lift-off distance, and the flame length according to velocity ratio. In order to investigate the mixing structure of the flame base at the lower limit, we employ the RMS technique and measure the species concentration by a gas chromatography. In the results of the stability curve and lifted flame, it is fecund that the dependency of nozzle diameter is closely related to the large-scale vortical structure representing counter-rotating vortices pair. Also, the detailed discussion on the phenomenon of blowout due to this large vortical motion, is provided.
Keywords
Cross Flow; Velocity patio; Momentum Ratio; Liftable Flame; Non-lifting Flame; Lift-off Flame; Blowout; Blowout Limit; Blowout Distance; Bound Vortex; Counter-rotaing Vertices Pair;
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