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This work focuses on the effects of ethanol addition on soot particle size distributions functions in ethylene/air premixed flame. The mixed ethanol/ethylene chemical reaction mechanism was used to calculate the concentrations of gaseous components in the premixed flame. A Monte-Carlo stochastic method was used to solve the particles dynamical model, which including particle inception, coagulation, and surface reaction. Particle size distributions functions in different heights of the flame were obtained with different amounts of ethanol added into ethylene. Three different equivalence ratios (1.78, 2.01, and 2.34) and four different blend ratios of ethanol/ ethylene (0%, 10%, 20%, and 30%) were investigated. The simulated results showed that mole concentrations of some important oxidant species, i. e. OH, H, and O, were enhanced by ethanol addition. Thus, the soot and soot precursor’s formation, such as ethylene, polycyclic aromatic hydrocarbon, etc., were restricted owing to the increasing oxidation reaction with ethanol addition. Meanwhile, large particles were reduced when ethanol blended to the ethylene at the same height of the flame.
PAPER REVISED: 2017-07-04
PAPER ACCEPTED: 2017-07-16
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THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Issue 3, PAGES [1339 - 1350]
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