Suscripción a Biblioteca: Guest
Ninth International Symposium on Turbulence and Shear Flow Phenomena
June 30 - July 3, 2015, University of Melbourne, Australia

DOI: 10.1615/TSFP9

Flow-flame interaction in turbulent boundary layer flashback of swirl flames

pages 213-218
DOI: 10.1615/TSFP9.360
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SINOPSIS

Boundary layer flashback of lean-premixed swirling flames is investigated by focusing on the upstream flame propagation inside the mixing tube of a model combustor. High-speed stereoscopic and tomographic PIV synchronized with chemiluminescence imaging is applied to study the flow-flame interaction. The region of negative axial velocity upstream of the leading flame tip observed in previous studies is found to not correspond to reverse flow or flow separation. Instead, streamlines are merely deflected by the blockage induced by the flame. The velocity field in the burnt gas is analyzed in order to shed light on the mechanisms that govern the flow-flame interaction.

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