Near-blowoff dynamics of lean premixed flames stabilized on a meso-scale bluff body

Y.J. Kim, B.J. Lee, H.G. Im

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

Bluff-body flame stabilization serves as a canonical configuration to investigate the characteristics of flame stability in many practical combustion devices. As a well-defined model problem, bluff-body-stabilized flames in meso-scale channels are investigated using high fidelity simulations with full temporal and spatial resolution. Direct numerical simulations were conducted to investigate the fundamental mechanisms of lean premixed flames stabilized by a bluff body in a channel. Non-reacting flow simulations of hydrogen/air mixture were conducted to identify a weak confinement condition. Reacting flow simulations of both hydrogen/air and syngas/air mixture were conducted to observe near-blowoff flame dynamics as mean inflow velocity approaches the blowoff limit. Detailed temporal evolution as the flame approaches the blow-off limit is examined by the analyzing the instantaneous solution fields. � 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.
Original languageEnglish (US)
StatePublished - 2016

Keywords

  • Aerospace engineering
  • Aviation
  • Computational fluid dynamics
  • Flow simulation
  • Mixtures
  • Stabilization, Bluff-body flame
  • Bluff-body stabilized
  • Fundamental mechanisms
  • High-fidelity simulations
  • Lean premixed flames
  • Practical combustion
  • Temporal and spatial
  • Temporal evolution, Combustion

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