袁达忠,马学虎,房正

• 1:大连理工大学化学工程系

摘要(Abstract)：

对两相闭式热管内的流动与传热特性进行数值模拟。分段建立热管内的流动与传热方程,通过编写程序对控制方程进行求解。采用离散液膜下降高度方法,联合利用复合辛普森数值积分和四阶龙格库塔数值微分方法成功地实现模型求解过程。将热管内充液量、饱和蒸汽温度和加热段热流密度作为影响因素进行数值计算。在分析中考虑下降液膜和上升蒸汽之间界面剪切力的影响。数值计算结果发现,尽管界面剪切力有时对传热过程的影响不大,但冷凝段和蒸发段的液膜都有所增厚,模型预测结果与实验测量值吻合程度有所改善。数值模拟结果表明,综合考虑热管内界面剪切力和总体充液量对热管流动与传热特性的影响是有必要的,由此获得的传热特性关联式更符合实际情况,可以为热管换热器的性能计算和设计提供指导。

关键词(KeyWords)： 两相闭式热虹吸管;流动与传热;降液膜;热管热阻

Abstract:

Keywords:

基金项目(Foundation): 教育部新世纪优秀人才资助计划项目(NCET-05-0280);; 大连市科技计划项目(2005E21SF207)

作者(Author): 袁达忠,马学虎,房正

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