回転2球間クエット流におけるかく乱の基本周波数のすきま比依存性 : すきまが狭い場合

概要

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Fundamental frequencies of the disturbance in the Taylor-Gortler (TG) vortex flow are investigated for two narrow gap cases in a spherical Couette system in which only the inner sphere is rotating. Two types of fundamental frequencies, f_S and f_W, are clarified by simultaneous spectral and flow-visualization measurements done by measuring the intensity of laser light scattered by the aluminum flakes used for flow-visualization. These two types of frequencies correspond to the spiral TG vortices and the traveling waves on the toroidal and spiral TG vortices, respectively. The simultaneous appearance of several values for f_S at the same Reynolds number is caused by various starting points of spiral TG vortices at different meridian angles. The dependence on clearance ratio of rotation frequencies is considered for f_S and f_W in comparison with circular Couette flow.
一般社団法人日本機械学会の論文
1989-09-25