Abstract
A cyclone separator uses the centrifugal force produced by a swirling flow in order to separate substances with the same specific weight but different sizes. The design of the cyclone separator requires a knowledge about the properties of the swirling flow inside it. Particularly, considering the motions of small particles, it is necessary to investigate the characteristics of the swirling flow because their motions are considerably influenced by fluctuations in the flow. The purpose of present study is to clarify the turbulent characteristics of the swirling flow in the cyclone separator. Turbulent intensities and Reynolds stresses are carefully measured by a slanted hot-wire. In order to examine more detail turbulent characteristics, a large amount of time history data is measured by a parallel hot-wire probe. Power spectrum, coefficient of auto-correlation, micro scale, integral scale and dissipation are calculated by these data. As results of this investigation, we could make clear the mechanism of the swirling flow in the cyclone separator.
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