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  • stabilization of flow boiling in a micro tube with air injection

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 962
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      air injection as a stabilization method is evaluated for flow boiling in a micro tube. pyrex glass tube coated by ito film is employed as a test tube for flow visualization with water as a working fluid. air bubble and liquid slug lengths are controlled by changing air and liquid mass velocities. wall temperatures and inlet/outlet pressures show very large fluctuations during flow boiling without air injection. severe reverse flow is also observed from flow visualization. on the other hand, wall temperature and inlet/outlet pressures as well as visualized flow patterns become very stable with air injection. in addition, much higher heat transfer coefficients are obtained for air injected cases. it is observed from the flow visualization that the flow becomes much stable and shows regular patterns.

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