...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Two-phase flow in microchannels
【24h】

Two-phase flow in microchannels

机译：微通道中的两相流

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Gas-liquid two-phase flow patterns are visualized with a microscope for air-water flow in circular tubes of 20, 25 and 100 mum i.d. and for steam-water flow in a 50 mum i.d. circular tube, The superficial velocities cover a broad range of J(L) = 0.003-17.52 m/s and J(G) = 0.0012-295.3 m/s for air-water flows, Several distinctive flow patterns. namely, dispersed bubbly flow, gas slug flow, liquid ring flow, liquid lump flow, annular flow. frothy or wispy annular flow, rivulet flow, liquid droplets flow and a special type of flow pattern are identified both in air-water and steam-water systems, and their special features are described. It has been confirmed that two-phase flow patterns are sensitive to the surface conditions of the inner wall of the test tube. It has been evidenced that a stable annular flow and gas slug formation with partially stable thin liquid film formed between the tube wall and gas slugs appeared at high velocities under carefully treated clean surface conditions. At lower velocities, dry and wet areas exist between gas slug and the tube wall. The cross-sectional average void fraction was also calculated from photographs, showing a good agreement with the Armand correlation for air-water flow in lager tubes. Published by Elsevier Science Inc. [References: 40]
机译：用显微镜观察气液两相流动模式，以观察20、25和100毫米内径的圆形管中的空气-水流。蒸汽流量为50毫米内径圆形管，空气-水流的表观速度覆盖范围很广，J（L）= 0.003-17.52 m / s和J（G）= 0.0012-295.3 m / s，几种独特的流型。即分散的气泡流，气团流，液环流，液团流，环形流。在空气-水和蒸汽-水系统中都识别出泡沫状或细小的环形流动，小溪流，液滴流和特殊类型的流型，并描述了它们的特殊功能。已经证实，两相流型对试管内壁的表面条件敏感。业已证明，在经过仔细处理的清洁表面条件下，高速时会出现稳定的环形流动和气团形成，并在管壁和气团之间形成部分稳定的液态薄膜。在较低的速度下，气团和管壁之间存在干湿区域。横截面平均空隙率也由照片计算得出，表明与较大的管中空气水流的Armand相关性很好。由Elsevier Science Inc.发布[参考：40]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号