Effect of dispersion characteristics on particle temperature in an idealized nonpremixed reacting jet

A detailed parametric study has been performed of inert particle dispersion characteristics and their effect on particle temperature in an idealized n onpremixed, reacting co-flow jet. A one-way coupled Lagrangian simulation w as used, with the continuous phase solved using the Large Eddy Simulation ( LES) technique. The spatial dispersion is characterized by the particle Sto kes number and the injection location in both reacting and nonreacting jets . Results are consistent with those previously reported in the literature, where particles with a Stokes number near unity are preferentially-disperse d by the large-scale, coherent vortical structures of the shear layer. The heating characteristics are identified in terms of the governing nondimensi onal parameters for nonisothermal particulate two-phase flows. It is found that the particle temperature behavior is a strong function of the spatial dispersion behavior. For a majority of initial locations within the jet noz zle, particle heating is hindered by an enhanced spatial dispersion. (C) 20 00 Elsevier Science Ltd. All rights reserved.