Combustion and Flame, Vol.160, No.3, 635-640, 2013
Influence of coal dust on premixed turbulent methane-air flames
This study discusses the design of a new experimental platform, the Hybrid Flame Analyzer (HFA) to measure burning velocity of gas, dust, and hybrid (gas and dust) premixed flames. The HFA is used to analyze a particle-gas-air system of coal dust particles (75-90 mu m and 106-120 mu m) in a premixed CH4-air (phi(g) = 0.8, 1.0 and 1.2) flame. Experimental results show that particles usually increase the turbulent burning velocity. Smaller particle sizes and larger concentrations (>50 g/m(3)) increase turbulent burning velocity compared with larger particle sizes and lower concentration ranges. The experimental data is used to develop a correlation similar to turbulent gas flames to help modeling of the complex behavior. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.