Transient behaviors of a flame over a Tsuji burner

Young Da Chen*, Da Da Chen, Chiun-Hsun Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The present study investigated numerically the physical mechanisms underlying the transient behaviors of the flame over a porous cylindrical burner. The numerical results showed that a cold flow structure at a fixed inflow velocity of U in = 0.6 m/s in a wind tunnel could be observed in two co-existing recirculation flows. Flow variations occur repeatedly until t = 4.71 s, and then a vortex existed steadily behind the burner and no shading occurred. The ignition of flammable mixture led to a rapid rise in gas temperature and a sudden gas expansion. When it reached the stable envelope flame condition, U in is adjusted to an assigned value. Two blow-off mechanisms were identified. It was also found in the study flame shapes with buoyancy effects agreed with the ones observed experimentally by Tsai. Furthermore, the lift-off flame would appear briefly between the envelopes and wake ones, and was stabilized as a wake flame.

Original languageEnglish
Pages (from-to)645-659
Number of pages15
JournalActa Mechanica Sinica/Lixue Xuebao
Issue number6
StatePublished - 1 Dec 2008


  • Lift-off flame
  • Recirculation flow
  • Tsuji burner

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