Sooting turbulent jet flame: Characterization and quantitative soot measurements

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Journal titleApplied Physics B: Lasers and Optics
Pages409425; # of pages: 17
SubjectBurner design; CFD models; Coherent anti-Stokes Raman spectroscopy; Experimental data; Experimental database; Flame chemistry; Flame length; Flow field measurement; High quality; Jet flames; Kinetic soot models; Laser-induced incandescence; Non-premixed; Numerical tools; Optical diagnostics; Particle image velocimetries; Pilot flame; Preferred features; Soot concentration; Soot measurement; Soot model; Soot production; Sooting flames; Test case; Turbulent combustion; Turbulent flame; Turbulent jet flames; Turbulent vortices; Validation data; Velocity maps; Boundary conditions; Characterization; Computational fluid dynamics; Computer simulation; Dust; Ethylene; Explosives; Laser diagnostics; Raman spectroscopy; Reynolds number; Soot; Velocity measurement; Combustion
AbstractComputational fluid dynamics (CFD) modelers require high-quality experimental data sets for validation of their numerical tools. Preferred features for numerical simulations of a sooting, turbulent test case flame are simplicity (no pilot flame), well-defined boundary conditions, and sufficient soot production. This paper proposes a non-premixed C2H 4/air turbulent jet flame to fill this role and presents an extensive database for soot model validation. The sooting turbulent jet flame has a total visible flame length of approximately 400 mm and a fuel-jet Reynolds number of 10,000. The flame has a measured lift-off height of 26 mm which acts as a sensitive marker for CFD model validation, while this novel compiled experimental database of soot properties, temperature and velocity maps are useful for the validation of kinetic soot models and numerical flame simulations. Due to the relatively simple burner design which produces a flame with sufficient soot concentration while meeting modelers' needs with respect to boundary conditions and flame specifications as well as the present lack of a sooting "standard flame", this flame is suggested as a new reference turbulent sooting flame. The flame characterization presented here involved a variety of optical diagnostics including quantitative 2D laser-induced incandescence (2D-LII), shifted-vibrational coherent anti-Stokes Raman spectroscopy (SV-CARS), and particle image velocimetry (PIV). Producing an accurate and comprehensive characterization of a transient sooting flame was challenging and required optimization of these diagnostics. In this respect, we present the first simultaneous, instantaneous PIV, and LII measurements in a heavily sooting flame environment. Simultaneous soot and flow field measurements can provide new insights into the interaction between a turbulent vortex and flame chemistry, especially since soot structures in turbulent flames are known to be small and often treated in a statistical manner. © 2011 Springer-Verlag.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE)
Peer reviewedYes
NPARC number21271183
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Record identifierf39389ab-f43d-4739-bb66-47d1d0da1d91
Record created2014-03-24
Record modified2016-05-09
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