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首页> 外文期刊>Heat Transfer Engineering >Heat Transfer Measurements, Flow Pattern Maps, and Flow Visualization for Non-Boiling Two-Phase Flow in Horizontal and Slightly Inclined Pipe
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Heat Transfer Measurements, Flow Pattern Maps, and Flow Visualization for Non-Boiling Two-Phase Flow in Horizontal and Slightly Inclined Pipe

机译：水平和微倾斜管道中非沸腾两相流的传热测量，流型图和流可视化

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摘要

Local heat transfer coefficients and flow parameters were measured for air-water flow in a pipe in the horizontal and slightly upward inclined (2°, 5°, and 7°) positions. The test section was a 27.9 mm stainless steel pipe with a length to diameter ratio of 100. For this systematic experimental study, a total of 758 data points were taken for horizontal and slightly upward inclined (2°, 5°, and 7°) positions by carefully coordinating the liquid and gas superficial Reynolds number combinations. These superficial Reynolds numbers were duplicated for each inclination angle. The heat transfer data points were collected under a uniform wall heat flux boundary condition ranging from about 1,800—10,900 W/m~2. The superficial Reynolds numbers ranged from about 740 to 26,000 for water and about 560 to 48,000 for air. A comparison of heat transfer data and flow visualization revealed that the heat transfer results were significantly dependent on the superficial liquid and gas Reynolds numbers, inclination angle, and flow pattern. The experimental data indicated that even in a slightly upward inclined pipe, there is a significant effect on the two-phase heat transfer of air-water flow. Flow pattern maps and flow visualization results for different inclination angles are also presented and discussed.
机译：在水平和稍微向上倾斜（2°，5°和7°）位置的管道中测量空气-水流的局部传热系数和流量参数。测试部分是27.9毫米的不锈钢管，长径比为100。对于此系统的实验研究，水平和略微向上倾斜（2°，5°和7°）的数据点总计为758个通过仔细协调液体和气体的表面雷诺数组合来确定位置。对于每个倾角，这些表面雷诺数被重复。在均匀的壁热通量边界条件下（约1,800-10,900 W / m〜2）收集传热数据点。表面雷诺数对于水为约740至26,000，对于空气为约560至48,000。传热数据和流动可视化的比较显示，传热结果显着取决于表面的液体和气体雷诺数，倾角和流动模式。实验数据表明，即使在稍微向上倾斜的管道中，对空气-水流的两相传热也有显着影响。还介绍和讨论了不同倾角的流型图和流可视化结果。

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  • 来源
    《Heat Transfer Engineering》 |2007年第6期|p.525-540|共16页
  • 作者

    AFSHIN J. GHAJAR; CLEMENT C. TANG;

  • 作者单位

    School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工业用热工设备;
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