1903 アスペクト比の小さいTaylor-Couette渦流れの解析(OS19-1 超音波を利用した流動場の計測,オーガナイズドセッション)

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In this study, numerical analysis and experimental measurement is carried out for Taylor-Couette vortex flow (TVF) with a small aspect ratio, which is generated between two concentric rotating cylinders with a radial ratio of 0.667. The aspect ratio defined with the gap length between the inner and outer cylinders and the height of the working fluid is 3. Successive instantaneous and mean velocity profiles were obtained with using an ultrasonic velocity profiler (UVP). The spatiotemporal velocity field was analyzed by the fast Fourier transforms. In the result, the characteristics of Wavy Vortex Flow (WVF) and Modulated Wavy Vortex Flow (MVF) transition are measured and the critical Reynolds number to the WVF is qualitatively agreed with the numerical in the case of a normal 2 Cell.
2010-10-29