Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions
文献类型：期刊论文
| 作者 | Sun, BX; Xu, XZ; Lai, YM; Wang, SJ; Zhang, JZ |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2005-12-01 |
| 卷号 | 50期号:23页码:2744-2754 |
| ISSN号 | 1001-6538 |
| 关键词 | permafrost Qinghai-Tibet Plateau climate warming fractured-rock embankment natural convection |
| DOI | 10.1360/982004-639 |
| 通讯作者 | Sun, BX(sbinxiang@263.net) |
| 英文摘要 | Mechanism and evolution of the pore-air natural convection cooling effect in fractured-rock embankments in permafrost regions are studied using a numerical representation of the non-dimensional governing equations in variable permeability porous media. The analyses show that winter-time natural convection in fractured-rock embankments begins to occur in the side slope portions and gradually develops from the left and right side slope portions to the middle portion of embankment. The more significant distortion of isotherms from their initial orientations due to heat conduction alone is that the cooling effect of winter-time natural convection on the fractured-rock embankment is stronger. The minimum critical Rayleigh numbers triggering natural convection of the pore-air in the side slope portions and the middle portion of embankment were obtained. The factors of influence on triggering winter-time convection cooling effect in fractured-rock embankments were analyzed. Finally, the assertion that the techniques of the fractured-rock revetment and berm are the effective measures to maintain the heat stability of the roadbed in permafrost regions is theoretically demonstrated. |
| 收录类别 | SCI |
| WOS关键词 | THERMAL REGIME ; POROUS-MEDIA ; ACTIVE LAYER ; TEMPERATURE ; RAILWAY ; PLATEAU ; BALLAST ; MODEL |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000235457300014 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555700 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Sun, BX |
| 作者单位 | 1.Shaoxing Coll Arts & Sci, Dept Civil Engn, Shaoxing 312000, Peoples R China 2.Chinese Acad Sci, State Key Lab Frozen Soil Engn Cold & Arid Reg, Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Minist Commun, Highway Survey & Design Inst 1, Xian 710068, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, BX,Xu, XZ,Lai, YM,et al. Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions[J]. CHINESE SCIENCE BULLETIN,2005,50(23):2744-2754. |
| APA | Sun, BX,Xu, XZ,Lai, YM,Wang, SJ,&Zhang, JZ.(2005).Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions.CHINESE SCIENCE BULLETIN,50(23),2744-2754. |
| MLA | Sun, BX,et al."Mechanism of evolution on winter-time natural convection cooling effect of fractured-rock embankment in permafrost regions".CHINESE SCIENCE BULLETIN 50.23(2005):2744-2754. |
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来源：寒区旱区环境与工程研究所
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