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| SEEPAGE CYLINDRICAL HEAT SOURCE MODEL OF DAM
AND ITS EXPERIMENTAL STUDY |
| DONG Haizhou1，2，ZHANG Xiaoyan2 |
(1. School of Earth Sciences and Engineering，Hohai University，Nanjing，Jiangsu 210098，China；
2. College of Civil and Transportation Engineering，Hohai University，Nanjing，Jiangsu 210098，China) |
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Abstract The concentrated leaking water has heat exchange with rock and soil during its flowing，resulting in the change of ambient underground temperature distribution. Considering its own characteristics，the concentrated leakage passage can be regarded as a circle column. Based on analyzing the characteristics of temperature and seepage fields influenced by concentrated leakage passage in rock and soil，a circle columnar heat source model has been established to describe the heat conduction processes in and out of the passage，respectively. By the deduction of heat conduction differential equation，the functions of fluid temperature distribution on flow path have been determined under two conditions of finite and infinite leaking pathway length，eventually leaking velocity can be determined by inverse calculation. Through laboratory experiments，the heat transfer of leaking groundwater has been simulated，and the distribution of temperature has been studied under different influences such as heat source intensity，boundary conditions，and leakage flux，etc. Comparison of the experimental data and the corresponding model value showed that the errors were very small，which proved that the established heat source model and its calculation method were practicable.
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Received: 03 December 2010
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2011, Vol. 30 
