Abstract
Two-dimensional, angle-resolved LDV(Laser Doppler Velocimetry) measurements of the turbulent rotating flow field in a confined cylinder have been performed. The configurations of interest are flows between a rotating upper disk with a rod attached by a disk or impeller(??= 45°, 90°) and a stationary lower disk in a confined cylinder. The mean now velocity as well as the turbulent intensity of the now field have been measured. The results show that the now is strongly dependent on the position of the impellers or the disk, negligibly affected by the Reynolds number in turbulent flow. It is observed that the mixing effect of the axial now impeller(??= 45°) is better than that of the radial flow impeller(??= 90°) or a disk.
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