K-1118 偏心二重円簡間に発生するTaylor渦流れの非定常挙動(G05-11 回転流)(G05 流体工学部門一般講演)

概要

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Unsteady behavior of Taylor vortex flow between eccentric rotating cylinder was investigated by three-dimensional incompressible N-S simulation. Research attention has been focused on unsteady fluid force acting on the inner rotating cylinder. Fluctuation of resultant force is largely influenced by generation and recession of Taylor vortices formed in the vicinity of the most narrow region of the eccentric clearance. When the number of Taylor vortices are regularly formed, momentum of the inner fast fluid is transported toward the outer region to form the low-pressure field. Then the time history of fluid force shows positive extreme against the most narrow region of the clearance. In the same way, negative extreme of the fluid force happens when vortices are disappeared by merging. Moreover, small perturbations overlaid on the force fluctuation are found to be caused by birth of vortices aligned along the inner cylinder.
一般社団法人日本機械学会の論文
2001-08-22