C322 強制対流サブクール沸騰における気泡挙動の実験観察(C-32 混相流・機能性流体(2),一般講演)

概要

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A visual study was conducted on the behavior of vapor bubbles in vertical upward forced convective boiling of water. The test section was a transparent glass tube, and the outer surface of a tube was heated electrically to generate vapor bubbles. By using high speed cameras, bubble behavior was observed visually. The mean velocity of bulk flow was kept around 1m/s, and the liquid subcooling and applied heat flux were changed parametrically. As a result, the behavior of vapor bubbles after the departure from a nucleation site was roughly classified into two patterns. Some bubbles slid upward the vertical wall for long distance while others were detached from the wall and then reattached to the wall or collapsed in subcooled bulk liquid. It was inferred that the difference in bubble rise path was induced by the difference in the rapidity of shape change during the short period after the nucleation.
日本流体力学会の論文
2004-08-09