Journal
COMBUSTION AND FLAME
Volume 156, Issue 10, Pages 1862-1870Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2009.05.010
Keywords
Soot; Probe sampling; Premixed flame; Particle size distribution function
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Funding
- National Science Foundation [CBET 0651990]
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A burner-stabilized, stagnation flame technique is introduced. In this technique, a previously developed sampling probe is combined with a water-cooled circular plate such that the combination simultaneously acts as a flow stagnation surface and soot sample probe for mobility particle sizing. The technique allows for a rigorous definition of the boundary conditions of the flame with probe intrusion and enables less ambiguous comparison between experiment and model. Tests on a 16.3% ethylene-23.7% oxygen-argon flame at atmospheric pressure show that with the boundary temperatures of the burner and stagnation surfaces accurately determined, the entire temperature field may be reproduced by pseudo one-dimensional stagnation reacting flow simulation using these temperature values as the input boundary conditions. Soot particle size distribution functions were determined for the burner-stabilized, stagnation flame at several burner-to-stagnation surface separations. It was found that the tubular probe developed earlier perturbs the flow and flame temperature in a way which is better described by a one-dimensional stagnation reacting flow than by a burner-stabilized flame free of probe intrusion. (C) 2009 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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