[1]王迎慧,孙宁,归柯庭.烟气横掠螺旋槽管束磨损特性的数值模拟[J].东南大学学报(自然科学版),2014,44(3):585-590.[doi:10.3969/j.issn.1001-0505.2014.03.024]
　Wang Yinghui,Sun Ning,Gui Keting.Numerical simulation on erosion characteristics of flue gas flowing across spirally corrugated tubes in aligned arrangement[J].Journal of Southeast University (Natural Science Edition),2014,44(3):585-590.[doi:10.3969/j.issn.1001-0505.2014.03.024]
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烟气横掠螺旋槽管束磨损特性的数值模拟()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第3期
页码:
585-590
栏目:
能源与动力工程
出版日期:
2014-05-16

文章信息/Info

Title:
Numerical simulation on erosion characteristics of flue gas flowing across spirally corrugated tubes in aligned arrangement
作者:
王迎慧1; 孙宁1; 归柯庭2
1江苏大学能源与动力工程学院, 镇江212013; 2东南大学能源与环境学院, 南京210096
Author(s):
Wang Yinghui1;  Sun Ning1;  Gui Keting2
1School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
2School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
气固两相流;  螺旋槽管;  壁面磨损;  离散相模型;  数值模拟
Keywords:
gas-solid flow;  spirally corrugated tube;  wall erosion;  discrete phase model;  numerical simulation
分类号:
TK223.3
DOI:
10.3969/j.issn.1001-0505.2014.03.024
摘要:
为探究烟气中固体颗粒对螺旋槽管束的磨损行为,应用离散相模型对烟气横掠顺列螺旋槽管束进行气固两相流动的数值模拟,并通过用户自定义函数引入新的磨损计算模型.分析了飞灰颗粒对光管和螺旋槽管磨损的差异以及烟气流速、粒径、横向/纵向管距和螺距、槽深等因素对螺旋槽管磨损的影响.结果表明:相同工况下,螺旋槽管管束磨损率比光管管束小10%左右;磨损率随烟气流速、颗粒直径、纵向管距的增大而增大;小粒径颗粒(dp=25 μm)最大磨损位置发生在圆心角30°左右,较大粒径颗粒最大磨损位置发生在圆心角40°左右;磨损率随横向管距、螺距、槽深的增大而减小;槽深对螺旋槽管磨损率的影响远低于螺距的影响.
Abstract:
To investigate the erosion of spirally corrugated tubes produced by solid particles in flue gas, numerical simulation was performed applying the discrete phase model to predict particles trajectory while flue gas flowing across spirally corrugated tubes in aligned arrangement. And a new reliable erosion calculation model was introduced through the user-defined functions. Differences of erosion characteristics between smooth tubes and spirally corrugated tubes caused by particles were analyzed. Effects of the flue gas velocity, particle diameters, transverse space, longitudinal space, pitch and groove depth on the erosion characteristics were also discussed. The results show that the erosion rate of spirally corrugated tubes is decreased about 10% compared to that of smooth tubes under the same conditions. With the increase of the flue gas velocity, particle diameters and transverse space, the erosion rate increases. The most serious wear point occurs at the central angle of 30° for smaller diameter particles(dp=25 μm)and 40° for larger particles. The erosion rate decreases with the increase of the longitudinal space, pitch and groove depth. The influence of the groove depth on the erosion rate is far less than that of the pitch of spirally corrugated tube.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-10-10.
作者简介: 王迎慧(1968—),男,博士,副教授, w.yh.68@163.com.
基金项目: 国家自然科学基金资助项目(51276039).
引用本文: 王迎慧,孙宁,归柯庭.烟气横掠螺旋槽管束磨损特性的数值模拟[J].东南大学学报:自然科学版,2014,44(3):585-590. [doi:10.3969/j.issn.1001-0505.2014.03.024]
更新日期/Last Update: 2014-05-20