摘要
为了验证旋流强度对微型锥形稳燃燃烧器(EV燃烧器)燃烧性能的影响,利用烟气分析仪对不同工况下烟气中NOx质量浓度进行检测,并应用计算流体力学软件Fluent进行仿真。结果表明:在额定工况下,采用强旋流可以使燃烧反应趋于稳定,使NOx质量浓度下降21.2%,而流量较小时,采用强旋流反而使燃烧过程变得不稳定,NOx质量浓度上升6.2%;在回流区减弱时燃料与空气混合度下降约为0.42×10-5;在EV燃烧器设计中,不同流量应采用不同旋流强度。
In order to verify the effects of swirl intensity on miniature cone stationary combustion burner（EV burner）,the flue gas analyzer was used to detect the concentration of NOxin flue gas under different working conditions,and the computational fluid dynamics software Fluent was applied to carry out the simulation.Experimental results show that,under rated condition,strong swirl intensity stabilized the combustion and reduced the NOxconcentration by 21.2%.However,when the flow rate was low,with strong swirl intensity the combustion became instable,and the NOxconcentration increased by 6.2%,the mixing degree of the air and fuel decrased to about 0.42×10-5 when the back-flow weakened.Therefore,during the EV burner’s design,for different flow rates,different swirl intensities should be adopted.
出处
《热力发电》
CAS
北大核心
2015年第11期32-36,42,共6页
Thermal Power Generation
基金
X99974_111引智计划项目
