A comparison of the structures of lean and rich axisymmetric laminar Bunsen flames: application of local rectangular refinement solution-adaptive gridding
作者： Beth Anne V Bennett , Joseph Fielding , Richard J Mauro , Marshall B Long , Mitchell D Smooke
DOI: 10.1088/1364-7830/3/4/304
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摘要: Axisymmetric laminar methane–air Bunsen flames are computed for two equivalence ratios: lean (Φ=0.776), in which the traditional cone forms above burner; and rich (Φ=1.243), premixed is accompanied by a diffusion flame halo located further downstream. Because extremely large gradients at fronts greatly exceed those flames, their resolution requires more sophisticated adaptive numerical method than ordinarily applied to flames. The local rectangular refinement (LRR) solution-adaptive gridding produces robust unstructured grids, utilizes multiple-scale finite-difference discretizations, incorporates Newton's solve elliptic partial differential equation systems simultaneously. LRR vorticity–velocity formulation of fully governing equations, conjunction with detailed chemistry, multicomponent transport an optically-thin radiation model. com...
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