並行気流中における環状液膜噴流の基本的分裂機構

概要

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The breakup mechanism of an annular liquid sheet jet in a cocurrent gas stream is experimentally investigated for gas velocity U_g 30 m/s and liquid velocity U_l 4.0 m/s. A flow visualization technique using a digital high-speed video camera and digital image processing is developed. The annular liquid sheet in the cocurrent gas stream oscillates periodically and is elongated in the downstream direction, and sometimes perforations on the annular liquid sheet surface are observed. Ligaments and rims are formed after the spread of the perforation as the typical configurations of liquid sheet deformation. In the final stage, the liquid ligament breaks up into fine liquid drops as the result of unsteady wave growth on the surface owing to the Kelvin-Helmholtz instability. The basic process of the annular liquid breakup in the cocurrent gas stream is clarified experimentally.
社団法人日本機械学会の論文
1996-02-25