气候变化领域集成服务门户(CCPortal): A numerical model of the coupled heat transfer for duct-ventilated embankment under wind action in cold regions and its application

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DOI	10.1016/j.coldregions.2006.03.002
	A numerical model of the coupled heat transfer for duct-ventilated embankment under wind action in cold regions and its application
	Zhang, Mingyi; Lai, Yuanming; Niu, Fujun; He, Shusheng
发表日期	2006
ISSN	0165-232X
EISSN	1872-7441
起始页码	103
结束页码	113
卷号	45 期号:2
英文摘要	The duct-ventilated embankment, as a special embankment structure, has been used to protect the underlying permafrost from thawing in Qinghai-Tibetan railway construction of China. For cold regions engineering, the temperature is the most important factor that determines the stability of construction, and wind can directly affect the temperature distribution in the construction. To research the stability of the duct-ventilated embankment under wind action, based on the wind, temperature and geology conditions of Qinghai-Tibetan Plateau, a three-dimensional numerical model of the coupled heat transfer for duct-ventilated embankment, which was composed of the air convective heat transfer problem between inside and outside duct, the coupled heat transfer problem between airflow and duct wall, and the heat conduction problem with phase change in roadbed, was analyzed to determine the temperature and velocity characteristics in the ventilated duct, as well as the temperature fields of the duct-ventilated embankment. The numerical model can reasonably solve the coupled heat transfer problem for duct-ventilated embankment; furthermore, from the results, it was found that, on the assumption that the air temperature will be warmed up by 2.2 degrees C in the future 50 years and in the areas where the mean annual air temperature is -4.0 degrees C, the duct-ventilated embankment structure can be an effective measure to decrease the ground temperature beneath it and ensure the stability of permafrost roadbed. (c) 2006 Elsevier B.V. All rights reserved.
英文关键词	numerical model; duct-ventilated embankment; coupled heat transfer; temperature and velocity characteristics; wind action; cold region
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	3-DIMENSIONAL NONLINEAR-ANALYSIS
WOS记录号	WOS:000238733300005
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239548
作者单位	Chinese Acad Sci, State Key Lab Frozen Soil Engn Cold & Arid Reg, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingyi,Lai, Yuanming,Niu, Fujun,et al. A numerical model of the coupled heat transfer for duct-ventilated embankment under wind action in cold regions and its application[J],2006,45(2).
APA	Zhang, Mingyi,Lai, Yuanming,Niu, Fujun,&He, Shusheng.(2006).A numerical model of the coupled heat transfer for duct-ventilated embankment under wind action in cold regions and its application.COLD REGIONS SCIENCE AND TECHNOLOGY,45(2).
MLA	Zhang, Mingyi,et al."A numerical model of the coupled heat transfer for duct-ventilated embankment under wind action in cold regions and its application".COLD REGIONS SCIENCE AND TECHNOLOGY 45.2(2006).