醇基燃料燃烧器的性能和场协同分析

Performance and Field Synergy Analysis of Alcohol-Based Fuel Burner

针对甲醇燃料扩散燃烧时醇基燃料燃烧器的机理，建立了阿累尼乌斯有限反应速率模型和漩涡破碎燃烧模型，在考虑对流和辐射传热损失的条件下进行了数值仿真和场协同分析．结果表明，当过量空气系数为1．1～1．2时，出口处的NOx和CO的质量分数较低，同时平均温度和最高温度较高，燃烧器性能较好；且在工作压力为0．18～0．19MPa时，速度场和温度场的协同性最佳，醇基燃料燃烧器燃烧效果最好．

Aiming at the mechanism of alcohol-based the Arrhenius limited reaction rate model and the eddy simulation and field synergy analysis are conducted by fuel burner with the diffusion combustion of methanol fuel, break-up combustion model are established, and numerical taking into consideration the heat loss due to convection and radiation. The results show that, when the excess air coefficient is 1.1 -1.2, the mass fractions of NOx and CO at the burner outlet are both low, while both the average temperature and the maximum temperature are high, thus bringing about excellent performance on the part of the burner; furthermore, when thepressure is 0. 18 -0. 19 MPa, the synergy between the velocity field and the temperature field proves to be the best, thus the best effect of the alcohol-based fuel burner being achieved.