| 双排管冻结下冻结壁温度场形成特征的数值分析 |
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| 引用本文： | 汪仁和,曹荣斌.双排管冻结下冻结壁温度场形成特征的数值分析[J].冰川冻土,2002,24(2):181-185. |
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| 作者姓名： | 汪仁和 曹荣斌 |
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| 作者单位： | 1. 中国科技大学力学与机械工程系,安徽合肥,230026,安徽理工大学土木工程系,安徽淮南,232001;2. 安徽理工大学土木工程系,安徽淮南,232001 |
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| 基金项目： | 安徽省自然科学基金;01044503; |
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| 摘 要： | 冻结时间、冻结壁厚度和冻结壁温度场的性状是冻结法施工的的关键参数，以工程实例为背景，考虑了水的导热系数和比热c的相态变化以及冻结管吸热参灵敏随温差而变化等因素，利用ANSYS大型有限元计算程序，对单、双排管冻结下冻结壁的形成及基变化特征进行详细的计算分析，得出了双排管冻结下冻结时间缩短、冻结效率提高、冻结壁平均温度下降等特性，最后，探讨了双排管冻结下冻结壁平均温度的简化计算方法。
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| 关 键 词： | 冻结壁 温度场 双排管冻结 有限元计算 平均温度 |
| 文章编号： | 1000-0240(2002)02-0181-05 |
| 修稿时间： | 2001年9月18日 |
Numerical Analysis of the Temperature Field Features in the FrozenWall with Double Rows of Freezing Pipes |
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| WANG Ren-he ,\ CAO Rong-bin.Numerical Analysis of the Temperature Field Features in the FrozenWall with Double Rows of Freezing Pipes[J].Journal of Glaciology and Geocryology,2002,24(2):181-185. |
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| Authors: | WANG Ren-he \ CAO Rong-bin |
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| Institution: | WANG Ren-he 1,2,\ CAO Rong-bin 2 |
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| Abstract: | The freeze time?the thickness of the frozen wall and the temperature field behavior of the frozen wall are the major factors in freezing construction. In the past years detailed analysis about the temperature field behavior of the frozen wall with single row of freezing pipes has been done, and now there have been useful and practical rule and calculation formulas for us to refer to. Following the development of the society, it is urgent to make use of freezing method under double or even more rows of freezing pipes in many practical engineering projects for some special reasons. Nevertheless, the analysis about the development and the changing character of the temperature field in the frozen wall with double or even more rows of freezing pipes is scarce. In this paper, the development and changing features of the temperature field in the frozen wall with single and double rows of freezing pipes are analyzed in detail with the ANSYS Finite Element Calculation Software, referring to one engineering project. Water having different thermal conductivity and different specific heat in two different phases is taken into account in the analysis. Again the thermal exchanging coefficient of the freezing pipes is considered varying with changing temperature contrast. \ \ The temperature field behavior under such condition is gotten from the analysis. The conclusion about the superiority of the freezing method under double rows of freeze pipes condition is drawn, that freeze time can be shortened largely, and the freeze efficiency can be improved largely, and the average temperature in the effective thickness of the frozen wall descends largely. This conclusion has significant guidance meaning in choosing the project of freezing construction. The simplified calculation method about the average temperature in the effective thickness of the frozen wall under double rows of freeze pipes condition is discussed in this paper,too. |
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| Keywords: | frozen wall temperature field frozen with double rows of freezing pipes finite element calculation average temperature |
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