| 非圆小通道内水-空气垂直上升流动流型研究 |
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| 引用本文： | 杨朝初,毕勤成,杨冬,陈听宽.非圆小通道内水-空气垂直上升流动流型研究[J].工程热物理学报,2006,27(5):787-790. |
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| 作者姓名： | 杨朝初 毕勤成 杨冬 陈听宽 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049 |
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| 基金项目： | 国家自然科学基金;陕西省自然科学基金 |
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| 摘 要： | 微化工机械以及紧凑式换热器的发展,使非圆截面小通道在工程中获得大量应用,但现有文献针对非圆截面小通道内两相流动的研究报导屈指可数。本文采用可视化手段研究了水力直径分别为2．886 mm和1．443 mm的三角形截面并联小通道内水-空气垂直上升流动,表现气速0．1~100 m／s,表观水速0．1~6 m／s。根据观察和测量结果,总结得到了流型转变界限,并获得了典型流型图像。将本文的实验结果与前人的研究结果对比表明:通道的截面形状和水力直径均对非圆截面小通道内两相流型转变界限有显著的影响。
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| 关 键 词： | 水-空气两相流 非圆通道 小通道 并联通道 流型 |
| 文章编号： | 0253-231X(2006)05-0787-04 |
| 修稿时间： | 2006年3月3日 |
AIR-WATER UPWARD FLOW IN NONCIRCULAR VERTICAL MINICHANNEL |
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| YANG Zhao-Chu,BI Qin-Cheng,YANG Dong,CHEN Ting-Kuan.AIR-WATER UPWARD FLOW IN NONCIRCULAR VERTICAL MINICHANNEL[J].Journal of Engineering Thermophysics,2006,27(5):787-790. |
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| Authors: | YANG Zhao-Chu BI Qin-Cheng YANG Dong CHEN Ting-Kuan |
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| Abstract: | With the development of micro chemical machine and compact heat exchanger, noncircular minichannels have been applied widely in industrial fields. However, few researches on two-phase flow in noncircular minichannel were reported. In this paper, flow visualization experiments of air-water upward flow was carried out in single and parallel triangular minichannels, with the hydraulic diameter of 1.443 and 2.886 mm, air superficial velocity ranging from 0.1 to 100 m/s, water superficial velocity from 0.1 to 6 m/s. The typical flow pattern images and flow pattern maps are obtained and analyzed. Comparisons with the available literatures show that both the cross-section shape and the hydraulic diameter have remarkable effect on the flow pattern transition in the noncircular minichannels. |
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| Keywords: | air-water two-phase flow noncircular channel minichannel parallel channel flow pattern |
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