|
| 微通道内流动沸腾特性研究 |
| Experimental study on flow boiling heat transfer performance in the microchannel |
| 投稿时间：2014-01-05 |
| DOI：10.13259/j.cnki.eri.2014.04.011 |
| 中文关键词: 微通道 流动沸腾换热 干度 换热关联式 模型 |
| 英文关键词:microchannel flow boiling heat transfer dryness heat transfer correlation model |
| 基金项目:国家自然科学基金资助项目(50876068) |
|
| 摘要点击次数: 3696 |
| 全文下载次数: 3420 |
| 中文摘要: |
| 对国内外微通道流动和换热的研究实验作了总结,阐述了影响微通道换热系数的因素,如热流密度、过热度和干度等.对去离子水在内径为0.65 mm、长为102 mm的圆形管道内流动沸腾换热进行了实验研究,得到了局部换热系数随干度的变化关系,进而根据换热系数的变化趋势讨论了饱和流动沸腾区微通道内主导的换热机制.结果表明:从换热系数随干度的变化关系很难判定主导的换热机制;将实验数据与已发表的预测关联式进行了比较,发现大多关联式都失效,说明基于常规理论的模型不再适用于微通道. |
| 英文摘要: |
| The studies of flow boiling heat transfer in a microchannel at home and abroad are summarized, as well as the factors that influence the heat transfer coefficient, such as heat flux density, degree of superheat and dryness.Experimental and theoretical analysis of flow boiling heat transfer in the microchannel with a diameter of 0.65 mm and a length of 102 mm were carried out to obtain the relationship between the local heat transfer coefficient and dryness.And the dominated heat transfer mechanism at saturated flow boiling region in the microchannel was discussed according to the variation of heat transfer coefficient.The results show that it is difficult to determine the dominated heat transfer mechanism from the relationship between heat transfer coefficient and dryness.The comparison between the experimental data and the published predictive correlations is made, and most of the correlations can't predict the experimental data well.It is concluded that the models based on conventional theories are no longer suitable for the microchannel. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
