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Experiments in Fluids

, Volume 52, Issue 2, pp 347–360 | Cite as

Premixed flame flashback in wall boundary layers studied by long-distance micro-PIV

  • Christian EichlerEmail author
  • Thomas Sattelmayer
Research Article

Abstract

Premixed flame propagation against the main flow direction in wall boundary layers, a situation known as wall flashback, has been studied by long-distance particle image velocimetry with spatial micron resolution (μ-PIV) and simultaneous flame luminescence recordings. Numerical simulations of laminar wall flashback assist the interpretation of the experimental results. Inside a turbulent boundary layer, the flame propagates in discrete flame cusps pointing in upstream direction and showing a well-defined pattern of formation and break-up. In a laminar boundary layer, the leading flame region is smooth and exhibits low curvature. The instantaneous velocity fields reveal a backflow region upstream of the flame during flashback, which is constrained to the leading flame zone. The backflow is caused by an interaction between the pressure increase upstream of the flame and the boundary layer. The flashback limit is controlled by thermal quenching of the flame tip in the backflow region.

Keywords

Turbulent Boundary Layer Equivalence Ratio Flame Propagation Premix Flame Laminar Flame 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This publication forms a part of the BIGCO2 project, performed under the strategic Norwegian research program Climit. The authors acknowledge the partners: Statoil, GE Global Research, Statkraft, Aker Clean Carbon, Shell, TOTAL, ConocoPhillips, ALSTOM, the Research Council of Norway (178004/I30, 176059/I30), and Gassnova (182070) for their support.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Lehrstuhl für ThermodynamikGarchingGermany

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