Laboratory investigation of the heat transfer characteristics of a trapezoidal crushed-rock layer under impermeable and permeable boundaries
文献类型：期刊论文
| 作者 | Zhang, Mingyi; Lai, Yuanming; Yu, Wenbing; Qi, Jilin |
| 刊名 | EXPERIMENTAL HEAT TRANSFER
 |
| 出版日期 | 2006-10-01 |
| 卷号 | 19期号:4页码:251-264 |
| 关键词 | trapezoidal crushed-rock layer porous medium heat transfer characteristics impermeable and permeable boundaries |
| ISSN号 | 0891-6152 |
| DOI | 10.1080/08916150600616535 |
| 通讯作者 | Lai, Yuanming(ymlai@lzb.ac.cn) |
| 英文摘要 | Crushed-rock layer can be taken as a highly porous medium, which is often used in highway/ railway embankment of permafrost regions. In this study, in order to investigate the characteristics of heat transfer of a trapezoidal crushed-rock layer, laboratory tests were carried out on the porous material with impermeable and permeable boundaries under wind condition. Case 1 was closed crushed-rock layer and Case 2 was open crushed-rock layer. The results for the two cases were analyzed and compared with each other. It can be concluded that the heat transfer rate of Case 2 is higher than that of Case 1, but long-term cooling capability of Case 1 is larger than that of Case 2 under the same experimental conditions. Furthermore, we found that the heat transfer mechanisms of the two cases are quite different from each other, namely, the energy exchange of the Case 1 mainly relies on the internal natural convection which is caused by thermal variations, while in Case 2 it is from the heat transfer enhancement because of the internal forced convection induced by the external air flow. Therefore, the boundary conditions (impermeable and permeable) of crushed-rock layer can have a very large impact on the heat transfer pattern, especially under windy condition. |
| 收录类别 | SCI |
| WOS关键词 | NATURAL-CONVECTION ; POROUS-MEDIUM ; PERMAFROST REGIONS ; RAILWAY EMBANKMENT ; COLD REGIONS ; MEDIA |
| WOS研究方向 | Thermodynamics ; Engineering |
| WOS类目 | Thermodynamics ; Engineering, Mechanical |
| 语种 | 英语 |
| WOS记录号 | WOS:000240435800001 |
| 出版者 | TAYLOR & FRANCIS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555800 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lai, Yuanming |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingyi,Lai, Yuanming,Yu, Wenbing,et al. Laboratory investigation of the heat transfer characteristics of a trapezoidal crushed-rock layer under impermeable and permeable boundaries[J]. EXPERIMENTAL HEAT TRANSFER,2006,19(4):251-264. |
| APA | Zhang, Mingyi,Lai, Yuanming,Yu, Wenbing,&Qi, Jilin.(2006).Laboratory investigation of the heat transfer characteristics of a trapezoidal crushed-rock layer under impermeable and permeable boundaries.EXPERIMENTAL HEAT TRANSFER,19(4),251-264. |
| MLA | Zhang, Mingyi,et al."Laboratory investigation of the heat transfer characteristics of a trapezoidal crushed-rock layer under impermeable and permeable boundaries".EXPERIMENTAL HEAT TRANSFER 19.4(2006):251-264. |
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来源：寒区旱区环境与工程研究所
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