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The governing equation for energy contains a compressible source term that models the flame.
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In the non-dimensional model, the flame base stabilization zone structure is resolved.
Three different mechanisms have been tested to model the flame, with good agreement between calculated and experimental results.
Results show that it is paramount to specify the inlet location at a certain distance upstream the burner exit to model the flame attachment phenomenon.
With the CD model, the flame becomes attached when either the value of Cϕ is increased to 3 or the pilot flame thermal power is increased by a factor of 1.5.
For two burners with spacing higher than zero, by assuming that the flame radiative fraction of propane is 0.3 and the flame emissivity is equal to that of the single flame, the flame radiative heat fluxes received by external targets are calculated by modeling the flame shapes as two right or tilted cuboids.
Nevertheless, in the CFD model the flame is quenched at near 370 crank angle degrees (Fig. 6), then a small amount of heat is gradually released from 370 to 440 crank angle degrees.
The heat sources in the models are the flame, the buoyant plume arising from the flame, and the smoldering combustion of organic material.
The comprehensive database of stable species of the experimental component of the study is tested by a comparison with the results of modeling the flames using two semi-detailed chemical kinetic mechanisms, Ranzi-mech and JetSurF.
Three recently developed chemical kinetic models were utilized to model the flames and thus investigate the kinetic pathways controlling the formation of C2H4 and two key soot precursors, namely C2H2 and C3H3, aiming to provide insight into the experimentally observed differences in the sooting propensity among the flames of the various fuels that were considered.
The finding is clarified in the framework of an acoustic network model, where the flame is described by an acoustic scattering matrix.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com