Flame structure of nozzles offsetting opposite flows

Yuji Yahagi, Yuichiro Morinaga, Kyosuke Hamaishi, Ikuyo Makino

Research output: Contribution to journalArticle

Abstract

Effects of vortexes behind flame zone on the flame structures are investigated experimentally by nozzles offsetting opposite flows with 2D laser diagnosis. Methane air premixed gas issued from upper and lower burners with equal flow rate. An imbalanced counter flow is produced to slide the lower burner from the center axis. In our proposed flow system, the vortexes are only formed in the burnt gas region by the shear stress due to the velocity difference between the upper flow and lower flow. Three distinct flames structures, slant flames, edge shape flames, and hyperbolic flames are decided with the offsetting rate and fuel flows composition. The formed vortexes structures changed with the offsetting rate. The vortex formed behind the flame plays an important role for the flame stability.

Original languageEnglish
Article number032030
JournalJournal of Physics: Conference Series
Volume745
Issue number3
DOIs
Publication statusPublished - 2016 Oct 21

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nozzles
flames
burners
flow velocity
flame stability
fuel flow
counterflow
gases
chutes
shear stress
methane
vortices
slopes
air
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Flame structure of nozzles offsetting opposite flows. / Yahagi, Yuji; Morinaga, Yuichiro; Hamaishi, Kyosuke; Makino, Ikuyo.

In: Journal of Physics: Conference Series, Vol. 745, No. 3, 032030, 21.10.2016.

Research output: Contribution to journalArticle

Yahagi, Yuji ; Morinaga, Yuichiro ; Hamaishi, Kyosuke ; Makino, Ikuyo. / Flame structure of nozzles offsetting opposite flows. In: Journal of Physics: Conference Series. 2016 ; Vol. 745, No. 3.
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