Abstract
In this study, experiment was carried out for Taylor-Couette vortex flow(TVF) with a small aspect ratio. TVF is generated with two concentric rotating cylinders; a rotating inner cylinder and a fixed outer cylinder. Two test section sizes with radial ratio of 0.375 and 0.667 were applied. Aspect ratio and gap between inner and outer cylinder were kept constant 3 and 25 mm respectively. Successive instantaneous and mean velocity profiles were obtained by using an ultrasonic velocity profiler (UVP). The spatiotemporal velocity field was analysed by two dimensional Fourier transform. In this case, the characteristics of Wavy Vortex Flow (WVF) and Modulated Wavy Vortex Flow (MVF) transition are confirmed. Furthermore, the bifurcations between each cell modes namely the N-2Cell, N-4Cell, A-3Cell and A-4Cell modes are clarified. The flow was much cmplicated compared with the one observed in η=0.667.
