摘要
浅析了 3种形式的无油直接点火煤粉燃烧器的点火机理 ,提出了无油点火过程中火炬的扩张理论 ,这一理论较明晰地反映了着火进程。影响火炬扩张的因素有 :初始火炬能量强度 β、火炬卷吸扩张因子a1,(x) 、扩散引起的扩张因子a2 ,(x) 。煤粉火炬在扩张过程中 ,随时间、空间、空气动力场等的变化 ,火炬扩张的形式不同。 3种形式的无油直接点火煤粉燃烧器性能各异 。
An elementary analysis of ignition mechanism governing three types of coal-powder burners used for oilless direct ignition has been made, and a torch expanding theory in the process of oilless direct ignition being suggested. The said theory can distinctly reflect the process of catching fire. The factors influencing upon torch expanding are: the energy intensity B of initial torch; expanding factor (α)1, (x) due to torch's rolling suction; and expanding factor (α)2 , (x) caused by diffusion. In the expanding process, the coal powder torch's expanding form is varying with the change of time, space, and air flow field. The performance of coal-powder burners for three said types is different, an appropriate direct ignition style should be determined on the basis of fuel coal properties etc..
出处
《热力发电》
CAS
北大核心
2003年第2期62-64,共3页
Thermal Power Generation
