煤掺烧生物质旋流燃烧器流场的数值模拟  

Numerical Simulation for the Pulverized Coal-biomass Swirling Burner

作　　者：刘伟[1] 陈琪[1] 

机构地区：[1]北京交通大学动力与控制工程系,北京100044

出　　处：《工业加热》2011年第5期24-27,27,共4页Industrial Heating

基　　金：中央高校基本科研业务费专项资金资助项目(2009JBZ017-1)

摘　　要：为探索适用于煤掺烧生物质的旋流燃烧器结构形式,采用Fluent软件对旋流燃烧器进行了冷态数值模拟,计算结果表明旋流叶片安装角度合适,旋流燃烧器中流出的气体质点既有旋转向前的趋势,又有从切向飞出的趋势,气流初期扰动非常强烈。研究发现改变燃烧室形状对燃烧室内气相速度场、颗粒轨迹以及湍流强度等特性参数都有较大影响,长方体型燃烧室对燃料和氧化剂的混合和燃烧更有利。Fluent software is used to simulate the pulverized coal-biomass swirling burner. The computation results show that if the swirling leaves are installed with a suitable angle, the rotation of gas particles can not only have the axial velocity, but also have a greater tangential velocity, and the initial perturbation is very strong. The change in the shape of the combustion chamber influences the gas velocity field in the combustion chamber; particle trajectory as well as the characteristic parameters. The rectangular cavity chamber is more suitable for the combustion process.

关 键 词：生物质 旋流燃烧器 Fluent软件 数值模拟 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]