Local quenching phenomena of a lean premixed flat flame impinging with a pulsating air jet

Yuji Yahagi, I. Makino

Research output: Contribution to journalArticle

Abstract

Local quenching phenomena of a lean methane air premixed flat flame formed horizontally in a wall stagnating flow impinging with a pulsating air jet has been investigated experimentally. The burner system consists of 40mm inverted nozzle burner and a solid wall with 8mm diameter air jet placed in line vertically. The pulsating frequencies set up to 100Hz while the jet intensities generate up to 6 m/s by a loud speaker. Approximately '00mm disk shape flame front is curved by the pulsating air jet and the air jet impacting point is locally quenched. The fuel concentration of quenching start condition increases with increasing the intensity of air jet, because the increased jet intensity linked with the flame strain rate gain. For weak jet intensity range, the quenching hole becomes directly to develop the whole flame extinction. On the other hand, for moderate or strong jet condition, the flame can recover from the local quenching phenomena. In this condition, once the quenching hole creates, but the hole may close by the flame propagation or reigniting process. Then, the whole flame extinction limits are lower than no jet impacting condition depending on the circumstances.

Original languageEnglish
Article number012013
JournalJournal of Physics: Conference Series
Volume530
Issue number1
DOIs
Publication statusPublished - 2014

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air jets
flames
quenching
flame propagation
burners
extinction
disks (shapes)
wall flow
nozzles
strain rate
methane
air

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Local quenching phenomena of a lean premixed flat flame impinging with a pulsating air jet. / Yahagi, Yuji; Makino, I.

In: Journal of Physics: Conference Series, Vol. 530, No. 1, 012013, 2014.

Research output: Contribution to journalArticle

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