低アスペクト比二重円筒流れの乱流遷移過程におけるカオス流れの周波数解析

抄録

Taylor-Couette vortex flow with a low-aspect-ratio has characteristics such as the different vortex structure, because of a boundary layer of the top and bottom wall and the acceleration of the inner cylinder. In a case of large aspect ratio of Taylor Couette flow, the mechanism of the vortex like a chaotic flow has been shown by Fenstermacher and Takeda. The purpose of this study is to understand the flow mechanism with Taylor Couette system of the low-aspect-ratio using an ultrasound measurement and a numerical simulation. In this report, we mainly analyzed the process of transition to turbulent flow by using a spectra analysis in a radial and an axial direction.