0307 回転同軸二重円筒におけるポリマー一様溶液抵抗低減流れのLDV解析(OS3-1 流れの抵抗低減,オーガナイズドセッション)

概要

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Two-component LDV measurement of the turbulent statistics in the drag reducing flow of polymer homogeneous solution between the concentric cylinders was performed. Measurement has been conducted with changing rotating number of inner cylinder and concentration of the polymer solution. The drag reduction rate was achieved about 37 % in our experiment. As a result of LDV measurement, in the drag reducing flow of polymer solution, the mean azimuthal velocity near the wall of inner cylinder is higher than that of the pure water flow. The rms of azimuthal velocity fluctuation of polymer solution in the near-wall region is larger than that of the pure water, while the rms of radial velocity fluctuation of polymer solution is lower than that of the pure water. The Reynolds shear stress of the polymer solution near the wall of the inner cylinder is lower than that of the pure water.
社団法人日本機械学会の論文
2009-11-06