General characteristics of two-phase flow distribution in a multipass tube

Manabu Watanabe, Masafumi Katsuta, Katsuya Nagata, Kiyoshi Sakuma

    研究成果: Article

    46 引用 (Scopus)

    抄録

    An experimental study has been performed using two different types of multipass tubes, one with four vertical upward passes attached to a horizontal main pipe and the other with five horizontal passes placed to a vertically oriented main pipe. Passes had 6 mm inside diameter, and the inside diameter of main pipes was 20 mm for the vertical type and 6 mm for the horizontal type. Multipass tubes simulated evaporators for air-conditioning systems, and refrigerant R11 was used as the working fluid. Vapor and liquid flow rates at each pass were measured under various conditions of two-phase mixture at the main pipe inlet, that is, inlet flow rate and quality. Results suggested that measured values of flow distribution ratio presented a marked distinction between the vertical and horizontal types. On the other hand, in spite of different pass orientations, the same data trend that the flow distribution is dominated by the main tube inlet flow condition was observed, and the flow division ratio was estimated in terms of both phase flow rates before the junction. Based on these results, a flow split model was suggested and an attempt for the prediction of flow distribution was made.

    元の言語English
    ページ(範囲)32-44
    ページ数13
    ジャーナルHeat Transfer - Japanese Research
    24
    発行部数1
    出版物ステータスPublished - 1995

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    two phase flow
    Two phase flow
    flow distribution
    Pipe
    tubes
    inlet flow
    Inlet flow
    flow velocity
    Flow rate
    air conditioning
    evaporators
    working fluids
    refrigerants
    liquid flow
    Refrigerants
    Evaporators
    Air conditioning
    division
    Vapors
    vapors

    ASJC Scopus subject areas

    • Fluid Flow and Transfer Processes

    これを引用

    General characteristics of two-phase flow distribution in a multipass tube. / Watanabe, Manabu; Katsuta, Masafumi; Nagata, Katsuya; Sakuma, Kiyoshi.

    :: Heat Transfer - Japanese Research, 巻 24, 番号 1, 1995, p. 32-44.

    研究成果: Article

    Watanabe, Manabu ; Katsuta, Masafumi ; Nagata, Katsuya ; Sakuma, Kiyoshi. / General characteristics of two-phase flow distribution in a multipass tube. :: Heat Transfer - Japanese Research. 1995 ; 巻 24, 番号 1. pp. 32-44.
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