| 气体泄漏传热模型及其有限元分析 |
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| 引用本文： | 葛楠,彭光正,纪春华. 气体泄漏传热模型及其有限元分析[J]. 传感技术学报, 2008, 21(12) |
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| 作者姓名： | 葛楠 彭光正 纪春华 |
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| 作者单位： | 北京理工大学信息科学技术学院自动控制系,北京,100081;北京理工大学信息科学技术学院自动控制系,北京,100081;北京理工大学信息科学技术学院自动控制系,北京,100081 |
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| 基金项目： | 日本SMC公司资助项目 ， 面向21世纪教育振兴行动计划(985计划) |
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| 摘 要： | 对气体发生泄漏时漏孔处的流动与传热耦合特性进行研究。分析泄漏流动状态并考虑摩擦力影响,推导气体泄漏描述方程,利用焦耳-汤姆逊系数计算泄漏节流温差并采用压缩因子进行修正。基于有限元方法建立传热模型,对泄漏稳态流与热传导的耦合场进行仿真分析,进而通过红外热成像方式实现泄漏点定位。仿真与实验结果表明,该传热模型较好地表征了泄漏发生时漏孔处的热特性,为利用红外成像技术的泄漏定位方法奠定了基础。
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| 关 键 词： | 泄漏检测 传热模型 有限元分析 焦耳-汤姆逊效应 |
Heat Transfer Model of Air Leak and its Finite Element Analysis |
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| GE Nan,PENG Guang-zheng,JI Chun-hua. Heat Transfer Model of Air Leak and its Finite Element Analysis[J]. Journal of Transduction Technology, 2008, 21(12) |
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| Authors: | GE Nan PENG Guang-zheng JI Chun-hua |
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| Affiliation: | Department of Automatic Control, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Heat transfer characteristic coupled with flow field in air-leak is described.Considesing the effect of friction,air-leak flow motion equations are conducted,and the temperature difference in the leak throttling process is derived from expression of the Joule-Thomson coefficient corrected by a compressibility factor.Modeling and simulation of heat transfer coupled with steady air-leak flow are addressed by the finite element method.Furthermore,leak localization by utilizing infrared image process has been implemented.Experiment and simulation results verify that the heat transfer model coincides with the actual situation well and a foundation for leak diagnosis based on infrared thermography has been laid. |
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| Keywords: | leak detection heat transfer model finite element analysis Joule-Thomson effect |
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