サブチャンネル内気液二相流の乱流混合量の取り扱いについて : サブチャンネル間に圧力差がない未発達流れについて

概要

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Based on the assumption that the fundamental modes of the fluid transfer between subchannels are turbulent mixing, void drift and diversion crossflow in a developing (hydrodynamic nonequilibrium) two-phase flow, we have examined whether the following treatment is applicable or not, i. e. , whether the turbulent mixing rate in such a flow can be considered to be equal to the rate in the equilibrium state that the flow will attain. In order to obtain the data needed for the examination, experiments were performed for hydrodynamic nonequilibrium air-water churn flows without pressure differential between the subchannels, using simple vertical multiple channels consisting of two circular subchannels. Data on tracer concentration distribution along the channel axis were obtained for both gas and liquid phases. The analysis of the data showed that the assumption and the treatment mentioned above are valid for all nonequilibrium flows tested. Furthermore, it has been clarified that the effect of turbulent mixing on tracer mass exchanges between the subchannels is more dominant than that of void drift.
一般社団法人日本機械学会の論文
1995-03-25