摘要
为了揭示煤粉气流在带有乏气管道的一次风管内的运动轨迹及一次风进口段弯头的分离机理,采用标准k-ε双方程模型描述了旋流式燃烧器一次风气相场湍流流动,用随机轨道模型描述了其颗粒相运动,通过颗粒与流体相互耦合PISC算法,对管内气固两相流进行了数值模拟,为确定燃烧器出口一次风气流的着火和燃烧工况及弯管煤粉浓淡分离技术的应用提供了理论依据。
To reveal the movement track of pulverized coal air flow inside the primary air tube that is in lack of air and separating mechanism of elbow in the inlet section, k - ε two-equation model is used to describe turbulent flow of primary air flow field for the swirling burner, and random track model is used to depict particle movement. Numeric simulation is made on gas-solid two-phase flow by PISC algorithm coupling particle and fluid, providing theoretic basis for determining primary air flow ignition at the burner outlet and burning condition and the use of rich-lean separation of elbow pulverized coal.
出处
《东北电力技术》
2008年第9期1-4,共4页
Northeast Electric Power Technology
关键词
旋流式燃烧器
弯管
乏气管道
数值模拟
浓淡分离
Swirling burner
Elbow
Air-lack tubes
Numeric simulation
Rich-lean separation
