Open AccessStudy of Combustion Characteristics of Carbon Particles Clouds
Author(s) -
С. Г. Орловська
Publication year - 2015
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.16.1.210-216
Subject(s) - aerosol , dispersity , combustion , thermophoresis , materials science , mass transfer , ignition system , chemical engineering , carbon fibers , chemistry , thermodynamics , nanotechnology , composite material , nanoparticle , chromatography , physics , polymer chemistry , organic chemistry , nanofluid , composite number , engineering
High temperature heat and mass transfer and chemical kinetics are modeled in polydisperse cloud of coal particles taking into consideration reactions in pores and Stefan flow at the surface. Burning characteristics are calculated of bimodal aerosol, with the assumption of equal mass concentration of two fractions with two or three-fold difference between the mean particles diameters. It is shown that ignition delay of coarse particles in bimodal aerosol is significantly less than that of equal size particles in monodisperse aerosol. Also a burning time of fine particles is substantially less in bimodal aerosol. It is demonstrated that burning temperature is higher in case of bimodal aerosol in comparison with monodisperse one.