空気吸込みを伴う水噴流の挙動(流体工学,流体機械)

概要

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In order to atomize a liquid, the authors have investigated the behavior of air-water jets. In a series of experiments, we have discovered a strange phenomenon that the water jet accompanied with an air suction from the free surface has made a periodic radial splash of water drop. The purpose of the present paper is clear out the origin of this phenomenon and the behavior of water jet accompanied with an air suction. The behavior of water jet has been photographed by a digital camera aided with a flash light and high-speed video camera. Those experiments enable us to find the origin of a periodic radial splash due to a formation of single air bubble at the flow separation region inside the nozzle and due to explosive expansion of the bubble after injected in the free space. In order to analyze the radial splash of water, we have conducted the equation of spherical liquid membrane. The numerical results obtained have been compared with the experimental results and good agreement has been obtained in radial expansion velocity.
一般社団法人日本機械学会の論文
2005-03-25