垂直上昇気液二相流の流動様式に及ぼす液体粘度の影響

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タイトル別名
  • Effect of Liquid Viscosity on Flow Patterns in Vertical Upward Gas-Liquid Two-Phase Flow.
  • スイチョク ジョウショウ キエキ 2ソウリュウ ノ リュウドウ ヨウシキ ニ

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説明

The purpose of this experimental study is to investigate the effect of liquid viscosity on the flow patterns of upward air-liquid two-phase flow in a vertical tube 19.2mm in inner diameter and about 5.4m in length. Three different liquids, including water and aqueous glycerol solutions, were employed. Kinematic viscosity of these liquids varied from 1.0×10-6 to 14.7×10-6m2/s. The flow patterns were observed using a video recorder and still photography. The time-spatial characteristic maps of gas-liquid interfaces which were drawn using the mean liquid holdup signals detected by 70 pairs of holdup sensors arranged with the axial spacing of 15mm over the length of 1.035m were also used. In this report, we first defined the flow pattern of each flow. Next, the effects of liquid viscosity on the overall flow pattern and interfacial structures or the interfacial waves were discussed. Finally, based on those results we proposed flow pattern maps for each liquid viscosity. It is found that the flow pattern transitions strongly depend on the liquid viscosity.

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