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Structure and stabilization mechanism of a stratified premixed low swirl flame

Karl-Johan Nogenmyr ; Per Petersson ; Xue-Song Bai ; Christer Fureby ; Robert Collin ; Andreas Lantz ; Mark Linne (Institutionen för tillämpad mekanik, Förbränning) ; Marcus Alden
33rd International Symposium on Combustion (2010)
[Konferensbidrag, refereegranskat]

Simultaneous OH-, fuel- planar laser induced fluorescence (PLIF) and particle image velocimetry (PIV) measurements were performed in turbulent low-swirl stratified premixed flames. Acetone was used as a fuel tracer and seeded in to the lean premixed methane/air flow. A laser at 283 nm was used for both the fuel-, and OH-PLIF measurements. For PIV two Nd:YAG lasers operating at 532 nm were used. The combined PIV/PLIF images revealed e.g. the fuel distribution, entrainment of ambient air, mixing with the air/fuel stream and the resulting stratification in the trailing edge of the flame. Furthermore, the combined PLIF images visualized the preheat layer (> 1000K) and flame front location. Pockets of unburnt reactants were occasionally detected above the local flame front as a result from the flame wrinkling and following flame pinching. From the simultaneous PIV data flame-flow interaction was investigated including the large-scale vortex structures continuously created in the outer shear layer and its influence on the flame stabilization.

Denna post skapades 2010-10-08. Senast ändrad 2015-07-28.
CPL Pubid: 127409


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Förbränning (2007-2017)


Termisk energiteknik

Chalmers infrastruktur