基于柱状结构的热障涂层隔热性能数值研究

凌锡祥; 王玉璋; 王星

doi:10.11868/j.issn.1005-5053.2014.5.011

基于柱状结构的热障涂层隔热性能数值研究

doi: 10.11868/j.issn.1005-5053.2014.5.011

上海交通大学动力机械与工程教育部重点实验室,上海 200240

基金项目:

863计划（2014AA052803）

详细信息

通讯作者:
王玉璋（1973—），男，博士，副教授，主要从事气动热力学多相流传热传质，高温燃料电池及氢能利用研究，（E-mail）yuzhangwang@sjtu.edu.cn。

中图分类号: TK124
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- 被引次数: 0
出版历程
- 收稿日期: 2014-03-05
- 修回日期: 2014-03-27
- 刊出日期: 2014-10-01

Numerical Study of Thermal Insulation Properties of Thermal Barrier Coating Based on Columnar Structure

Key Laboratory for Power Machinery and Engineering of Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China

摘要

摘要: 基于四参数随机生长方法和热阻网络方法开发了涂层微结构构建和隔热性能分析软件，构建了各向异性孔隙结构的柱状涂层微结构，着重研究了柱状孔隙大小、数量和细长化对柱状涂层有效导热系数和隔热性能的影响。结果表明：提高涂层的孔隙率是增强涂层隔热性能的有效途径；孔隙率一定时，随着柱状孔隙直径减小，其隔热性能增强，并且结构更加稳定；孔隙率一定时，随着柱状孔隙细长化，其隔热性能在一定程度上会有所减弱，但其稳态导热温度分布更加均匀，结构更加稳定。
- 热障涂层 /
- 柱状微结构 /
- 孔隙率 /
- 有效导热系数 /
- 隔热性能
Abstract: To study the effects of pore micro-structure of columnar thermal barrier coating on its thermal insulation properties, software for constructing coating microstructure and analyzing thermal insulation properties were developed by combining the methods of quartet structure generation set (QSGS) and thermal resistance network. Based on this, anisotropy pore microstructure of columnar coating was also constructed. This paper focused on the impact of columnar pore sizes, number and thickness on effective thermal conductivity and thermal insulation properties of the coating. The results show that increasing the porosity of the coating is an effective way to enhance thermal insulation properties of the coating. When porosity is constant, as the columnar pores diameter decreases, its thermal insulation properties are enhanced, and the structure is more stable. When porosity is constant, as columnar pores elongate, its thermal insulation properties are weakened to some extent, but the steady-state temperature distribution is more uniform, the structure is more stable.
- thermal barrier coatin /
- columnar microstructure /
- porosity /
- effective thermal conductivity /
- thermal insulation properties

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参考文献(13)

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文章访问数: 1388
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PDF下载量: 104
被引次数: 0

基于柱状结构的热障涂层隔热性能数值研究

doi: 10.11868/j.issn.1005-5053.2014.5.011

通讯作者: 王玉璋（1973—），男，博士，副教授，主要从事气动热力学多相流传热传质，高温燃料电池及氢能利用研究，（E-mail）yuzhangwang@sjtu.edu.cn。

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Numerical Study of Thermal Insulation Properties of Thermal Barrier Coating Based on Columnar Structure

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目录

通讯作者:
王玉璋（1973—），男，博士，副教授，主要从事气动热力学多相流传热传质，高温燃料电池及氢能利用研究，（E-mail）yuzhangwang@sjtu.edu.cn。