| 矩形微槽内水的流动沸腾换热及可视化实验研究 |
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| 引用本文： | 王际辉,唐大伟,颜晓虹.矩形微槽内水的流动沸腾换热及可视化实验研究[J].中国科学院研究生院学报,2007,24(1):34-38. |
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| 作者姓名： | 王际辉 唐大伟 颜晓虹 |
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| 作者单位： | 1. 中国科学院工程热物理研究所,北京,100080;中国科学院研究生院,北京,100049
2. 中国科学院工程热物理研究所,北京,100080 |
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| 摘 要： | 本实验以水为工质，对截面尺寸为0.4mm×0.4mm水平布置的不锈钢矩形微槽内流动沸腾进行换热特性和可视化研究.质量流速范围为G＝62.5～187.5kg/m2s，进口温度分别为Tin＝30、45、 60°C.实验结果表明，在较低干度下，换热系数随着干度的增加而增加；干度较大时，换热系数保持不变直至换热恶化.质量流速的增加使换热系数有较大增加，进口温度的变化对换热系数几乎没有影响.可视化研究发现低壁面过热度时，有大量气泡产生；在本实验范围内，微槽内沸腾的流型主要有塞状流和环状流两种.
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| 关 键 词： | 矩形微槽 流动沸腾换热 可视化 流型 |
| 文章编号： | 1002-1175(2007)01-0034-05 |
| 修稿时间： | 2006年1月23日 |
An Experimental Study on the Flow Boiling Heat Transfer and its Visualization of Water in a Rectangular Micro-groove Horizontally Laid |
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| WANG Ji-Hui,TANG Da-Wei,YAN Xiao-Hong.An Experimental Study on the Flow Boiling Heat Transfer and its Visualization of Water in a Rectangular Micro-groove Horizontally Laid[J].Journal of the Graduate School of the Chinese Academy of Sciences,2007,24(1):34-38. |
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| Authors: | WANG Ji-Hui TANG Da-Wei YAN Xiao-Hong |
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| Institution: | Institute of Engineering Thermophysics, Chinese Academy of Sciences |
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| Abstract: | This paper describes an experimental investigation on flow boiling heat transfer and visualization of water in a steel micro-groove horizontally laid with rectangular cross section of 0.4×0.4mm2.The mass flux G is ranged from 62.5 to 187.5kg/m2s and the inlet temperature Tin is set as 30,45 and 60°C. The results show that, under the condition of low vapor quality, heat transfer coefficient increases with the increase of vapor quality; and hold a certain value until the boiling crisis happes under high vapor quality. The augment of the mass flux could increase the heat transfer coefficient markedly, while the change of the inlet temperature has a weak influence on it. During the visual study, the emergence of great deal of bubbles is observed when the wall superheat is low. The main flow patterns found in the experiment are plug flow and annular flow. |
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| Keywords: | rectangular micro-groove flow boiling heat transfer visualization flow pattern |
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