929 円筒形絞りに発生するキャビテーション特性 : 絞り部内圧力と可視化

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This paper deals with an experimental study on the pressure distribution and the behavior of cavitation bubbles for steady and unsteady flows. The unsteady flow took a trapezoid form with time at the upstream in a choke. The static pressures in a choke center were measured with the Pitot tube which placed in the center of a baffle plate. The surface pressures of four locations in a choke were measured with a pressure transducer for various unsteady flows. The behavior of cavitation bubbles was observed by a high-speed camera (100,000∿200,000 frames/s). It was found that when the cavitation developed sufficiently in a choke, there was no pressure difference between the center and the wall surface in a choke, and behavior at the moment of the collapsing bubble in a choke was captured by the high-speed camera.
社団法人日本機械学会の論文