尹洪超
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回转窑冷态射流和气固两相流数学计算
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Indexed by:期刊论文

Date of Publication:2013-10-28

Journal:硅酸盐学报

Included Journals:Scopus、EI、PKU、ISTIC、CSCD

Volume:41

Issue:11

Page Number:1527-1533

ISSN No.:0454-5648

Key Words:冷态射流 四通道煤粉燃烧器 颗粒轨道模型 数值模拟 cold jet four-channel pulverized coal burner particle-trajectory model numerical simulation

Abstract:应用数学方法研究了回转窑内冷态射流、气固两相流湍流场的流动特性及颗粒运动轨迹。应用文献中单相冷模实验对数学方法进行了有效验证,并分析四通道燃烧器各风道送风参数对窑内气流混合、回流大小及旋流强度的影响。在单相模型基础上,加入离散相颗粒轨道模型,考察在气相湍流场中喷入煤粉时气体运动及颗粒分布特性。结果表明:中心风对中心回流区的形成有重要影响;若使内旋流风与外直流风形成更强的速差射流,促进一次风对高温二次风的卷吸回流,将有利于煤粉燃烧;在重力作用下,随着煤粉粒径的增大,沉积在窑底部的煤粉越多;粒径为30μm的煤粉颗粒在窑内分布比较均匀。

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Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:能源与动力学院

Discipline:Thermal Engineering. Chemical Engineering. Operation Research and Control Theory

Business Address:大连理工大学能源与动力学院712室

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