Open AccessPASSIVE CONTROL OF PARTICLE DISPERSION IN A PARTICLE-LADEN CIRCULAR JET USING ELLIPTIC CO-ANNULAR FLOW: A MEANS FOR IMPROVING UTILIZATION AND EMISSION REDUCTIONS IN PULVERIZED COAL BURNER
Author(s) -
Ahsan Choudhuri
Publication year - 2003
Language(s) - English
Resource type - Reports
DOI - 10.2172/825091
Subject(s) - pulverized coal fired boiler , combustor , particle (ecology) , mechanics , coaxial , dispersion (optics) , jet (fluid) , materials science , coal , physics , mechanical engineering , chemistry , waste management , combustion , engineering , optics , geology , oceanography , organic chemistry
A passive control technology utilizing elliptic co-flow to control the particle flinging and particle dispersion in a particle (coal)-laden flow was investigated using experimental and numerical techniques. Preferential concentration of particles occurs in particle-laden jets used in pulverized coal burner and causes uncontrollable NO{sub x} formation due to inhomogeneous local stoichiometry. This particular project was aimed at characterizing the near-field flow behavior of elliptic coaxial jets. The knowledge gained from the project will serve as the basis of further investigation on fluid-particle interactions in an asymmetric coaxial jet flow-field and thus is important to improve the design of pulverized coal burners where non-homogeneity of particle concentration causes increased NO{sub x} formation