撞击预燃室煤粉燃烧器气固两相流特性研究  

Gas-Solid Two-Phase Flow Characteristics of the Pulverized Coal Burner with Impinging Pre-combustion Chamber

作　　者：王帅[1] 樊保国[1] 刘海玉[1] 金燕[1] 

机构地区：[1]太原理工大学电气与动力学院,山西太原030024

出　　处：《热能动力工程》2016年第11期43-49,共7页Journal of Engineering for Thermal Energy and Power

基　　金：山西省社会科学发展科技攻关项目(20130313001-1)

摘　　要：针对一种新型撞击浓缩预燃室煤粉燃烧器,通过实验和Fluent(数值模拟)的方法,研究了燃烧器射流的气固两相流流动特性,得到了不同二次风进风角度下的出口流场分布、浓度场分布及粒子运动轨迹。实验研究与数值计算一致认为,燃烧器二次风进风角度为(30°,45°)时,燃烧器存在飞边现象;二次风进风的切向倾角和轴向倾角对气流扩展角、旋流强度、射流长度等流动特性有重要影响;二次风进风角度为(5°,20°)时,燃烧器的流场分布及粒子运动轨迹最合理。The gas-solid two-phase flow characteristics of the pulverized coal burner with impinging pre-combustion chamber were numerically( by Fluent) and experimentally studied. The flow field,fuel concentration and particle trajectories of the burner were examined under different secondary air angles. It is concluded that there is open air in the burner when the secondary air angle is(30°,45°). The tangential and axial angles of the secondary air have an important influence on the air flow spreading angle,vortex intensity and flow jet length. The flow field and particle trajectories become more reasonable when the secondary air angle is(5°,20°).

关 键 词：煤粉燃烧器 气固两相流动 实验研究 数值模拟 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]