生物油燃烧与污染物排放特性的数值模拟
摘要
The commercial CFD-code FLUENT was used to simulate the bio-oil combustion in a lab-scale kiln. Three-dimensional numerical simulation was performed to obtain detailed information of the temperature and velocity fields, component distribution, flame shape and pollutant emissions, so as to reveal the characteristics of the flow, combustion, heat and mass transfer process in the kiln. The effect of excess air ratio on bio-oil combustion was also simulated. The results indicated that with the increasing of excess air ratio, the maximum combustion temperature and the CO concentration in the outlet were decreased, while the formation of NO X was increased. The simulation results agreed well with the experimental results, which confirmed the reliability of the model and would offer information for the combustion system optimization and pollutant control.