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Experimental study on the bubble generation characteristics for an venturi type bubble generator

机译：文丘里型气泡发生器气泡产生特性的实验研究

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摘要

Bubble generation plays a significant role for mass transfer. An experimental study was performed in a Venturi type bubble generator to evaluate the development of the bubble size distribution in the turbulence flow of an air-water system. As the air stream enters into the flowing water stream through small feedholes, it breaks into bubbles in the diverging section of the venturi tube. Based on the results of Kress's formulation on turbulence dissipation rate, the bubble size correlation with the Reynolds number and the surface tension coefficient was derived. For purpose of validation, the bubbly flow under various Re and gas volume ratios was measured by visualization technique. The experimental data proved that the volume averaged bubble diameter has a -1 power dependence on the Re, which agrees well with the theoretical derivation. Also, it is found that the bubble size is a linear function of the gas volume ratio and a revised formulation which includes the gas volume ratio effect was proposed.
机译：气泡的产生对于传质起着重要作用。在文丘里式气泡发生器中进行了一项实验研究，以评估空气-水系统湍流中气泡尺寸分布的发展。当气流通过小的进料孔进入流动的水流时，在文丘里管的发散段中，空气会破裂成气泡。根据克雷斯关于湍流耗散率的公式化结果，得出气泡尺寸与雷诺数和表面张力系数的相关性。为了验证的目的，通过可视化技术测量了在各种Re和气体体积比下的气泡流。实验数据证明，体积平均气泡直径对Re具有-1幂依赖性，与理论推导相符。而且，发现气泡尺寸是气体体积比的线性函数，并且提出了包括气体体积比效应的修正公式。

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  • 来源
  • 作者

    Junlian Yin; Jingjing Li; Hua Li; Wei Liu; Dezhong Wang;

  • 作者单位

    School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, China;

    School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, China;

    School of Mechanical Engineering, Shanghai Jiao Tong University, 200240, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bubbly flow; Bubble generator; Bubble size; Two-phase flow;

    机译：气泡流动气泡发生器气泡大小;两相流;

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