垂直管上昇気泡流の流動発達特性に及ぼす重力の影響（第２報，管断面相分布パターン）

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書誌事項

タイトル別名
  • Effect of Gravity on Flow Characteristics of Developing Vertical Upward Bubbly Flow (2nd Report, Cross-Sectional Phase Distribution Pattern)
  • スイチョクカン ジョウショウ キホウリュウ ノ リュウドウ ハッタツ トクセイ ニ オヨボス ジュウリョク ノ エイキョウ ダイ2ホウ カン ダンメン ソウブンプ パターン
  • 2nd Report, Cross-Sectional Phase Distribution Pattern
  • 第2報, 管断面相分布パターン

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Local flow measurements were performed for vertical upward bubbly flows in a 9 mm-diameter pipe at normal- and micro-gravity conditions. A stereo image-processing method was used for measuring void fraction profile, interfacial area concentration and Sauter mean diameter. The flow measurements were performed at four axial locations (axial distance from the inlet normalized by the pipe diameter, z/D=5, 20, 40 and 60) at various flow conditions of superficial gas velocity (0.00840-0.0298 m/s) and superficial liquid velocity (0.138-0.914 m/s). By taking into account the normalized parameters on void peak fraction and void peak intensity in pipe cross-section, the phase distribution pattern was quantitatively-classified into three patterns : a wall peak, a core peak and an intermediate peak. The phase distribution pattern maps were newly presented for vertical upward bubbly flows at normal-and micro-gravity conditions.

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