双锥燃烧室旋流强度的计算  

Swirl intensity calculation of double-cone fine coal combustion chamber

作　　者：王永英[1,2,3] 张鑫[1,2,3] 姜思源[1,2,3] 

机构地区：[1]煤炭科学研究总院节能工程技术研究分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [3]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013

出　　处：《洁净煤技术》2013年第6期79-84,共6页Clean Coal Technology

基　　金：科技部2011年国际合作项目(2011DFA60390);科技部2012年国际合作项目(2012DFA60860);中国煤炭科工集团科技创新基金资助项目(2011ZD002)

摘　　要：为了得到双锥燃烧室内旋流强度的计算公式，同时分析旋流强度对燃烧室内流场分布的影响，论述了旋流强度的一般定义及物理意义，推导出双锥燃烧室在直叶片和错角叶片2种叶片下的旋流强度计算公式，发现2种计算公式存在相似性。利用计算流体力学软件模拟得到2种叶片不同旋流强度下的流场分布。对比燃烧室良好运行的条件，得到双锥燃烧室良好运行的旋流强度可选区间为1．37～1．64。最后分析了燃烧室在2种叶片不同旋流强度下的阻力损失，结果表明安装错角叶片的燃烧室阻力损失比安装直叶片的燃烧室阻力损失小。To get the calculation formula for swirl intensity of double-cone fine coal combustion chamber and analyse the influence of swirl intensity on flow field distribution of combustion chamber, discuss the general definition and physical meaning of swirl intensity, get the computational formulae for swirl intensity on double-cone fine coal combustion chamber with two kinds of blade, find that the two computational formulae are similar. Using software about computational fluid dynamics, get flow field distribution in combustion chamber with two kinds of blade under different swirl intensities. Find that when the swirl intensity ranges from 1.37 to 1.64, the double-cone combustion chamber operates well. Analyse the resistance loss of the combustion chamber with two kinds of blade under different swirl intensity. The results show that the resistance loss of the combustion chamber with stagger angle blades is lower.

关 键 词：燃烧室 旋流强度 阻力损失 工业锅炉 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]