<b>Effect of Orifice Shape and Dissolved Gas on Bubble Generation in Two-Phase Nozzle Flow </b><b>by Pressurized Dissolution Method </b>

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Author(s)

    • NAUNG Khine Tun
    • Department of Engineering Mechanics and Energy, University of Tsukuba
    • MIKOSHIBA Rei
    • Department of Engineering Mechanics and Energy, University of Tsukuba
    • LEE Junhyuk
    • Department of Engineering Mechanics and Energy, University of Tsukuba
    • MONJI Hideaki
    • Department of Engineering Mechanics and Energy, University of Tsukuba

Abstract

<p>The aim of the study is to examine the effect of the amount of the dissolved gas on the two phase flow and to examine the acceleration of bubble generation on two-phase nozzle flow by modifying the shape of orifice plate. In the experiment, the molar concentration of CO<sub>2</sub> gas was changed at the dissolution process. As increasing the CO<sub>2</sub> molar concentration, the void fraction increased and the liquid velocity decreased at the throat. On the other hand, the bubble velocity was almost constant when dissolved gas rate was changed. Therefore, the slip velocity between the bubble and the liquid increased. Moreover, the amount of bubble is different by changing the hole type of orifice plate such as different holes diameter and respective cross section area for each plate. In case of the orifice of seven holes, it cannot reach the sound speed at the throat but it is closest to the sound speed in the case of other orifices.</p><p></p>

Journal

  • Advanced Experimental Mechanics

    Advanced Experimental Mechanics 1(0), 80-85, 2016

    The Japanese Society for Experimental Mechanics

Codes

  • NII Article ID (NAID)
    130005331658
  • Text Lang
    ENG
  • ISSN
    2189-4752
  • Data Source
    J-STAGE 
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