Flow Visualization and Ultrasonic Measurement of Taylor Vortex Flow at Small Aspect Ratio

Abstract

In this study, experiment was carried out for Taylor-couette voltex flow between a rotating inner cylinder and a fixed outer cylinder with small aspect ratio. It is two concentric rotating cylinders with a 25mm gap in aspect ration 3 and radial ratio 0.667 by mean of an ultrasonic velocity profiler (UVP). Successive instantaneous and mean velocity profiles were obtained by an ultrasonic Doppler velocity profile method, and the spatiotemporal velocity field had been analyzed by two-dimensional Fourier transform in following the transition region of the turbulent flows MVF and WVF of three cell mode, N-2Cell, N-4Cell and A-3Cell mode.