NDLI: Effect on flow field characteristics in methane–air non-premixed flame with steam addition

Content Provider	Springer Nature Link
Author	Gu, X. Zang, S. S. Ge, B.
Copyright Year	2006
Abstract	The present paper reports on an experimental study to determine the effect of humidity on the flow field and the flame stability limit in turbulent non-premixed flame, and examines the dynamical behavior of the unsteady aerodynamic flow structures observed on a bluff-body burner at both humid and non-humid air combustion states. Particle image velocimetry (PIV) is used to capture the instantaneous appearance of vortex structures and obtain the quantitative velocity field. Streamlines and velocity contours analysis are used to identify specific flame structures and reveal the effect of steam added on the vortex structure. The results show both central fuel penetration limit and partially quenching limit in the humid air case reduce. The decrease in the critical penetration limit is primarily attributed to a reduction in momentum of the humid air. The flamelet concepts are applied to discuss the partially quenching limit in the blue neck region. The analysis reveals that the large decrease in the partially quenching limit is due to the increase in chemical reaction time of the humid air combustion.
Starting Page	829
Ending Page	837
Page Count	9
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	41
Issue Number	5
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Humid air combustion Non-premixed combustion Recirculation zone Theoretical and Applied Mechanics Thermodynamics Measurement Science, Instrumentation Industrial Chemistry/Chemical Engineering Fluids Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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