21408 細長い流体管路内を移動する物体と壁面間の流れ場の基礎的検討(流体工学(4))

概要

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A sensing/transporting system that moves along with fluid inside a small-diameter tube is recently studied by many researchers and expected to be developed for engineering applications such as a PIG for a pipeline and a micro machine. Flow field ahead, inside, and behind a rigid body has been experimentally observed and analyzed with a support of a unique numerical program. It was observed that there exists a Rankine compound vortex at the inner-rear part of the body. A flow layer where the flow is trailed along with the moving top surface was also observed. It is concluded that a Rankine compound vortex appears at the inner-rear part of the body. It is also concluded that, as the Reynolds number increases, the layer becomes thin and the flow only moves within the layer.
一般社団法人日本機械学会の論文
2007-03-15