Theoretical Analysis on the Flow Inside a New Beadless Disperser
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概要
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In this paper, a theoretical analysis on the flow over micro-clearance between stationary disk and rotating disk at small mass flow rate was studied for the improvement of dispersion performance of a new headless disperser. <BR>As the results of this study, characteristics of the flow over the dispersion part of the new beadless disperser were found to be expressed as follows. <BR>(1) The feature of the flow at a small clearance depends on Reynolds number and dimensionless mass flow rate. <BR>(2) The friction moment coefficient of the rotating disk at a small mass flow rate can be calculated by the following equation. <BR>CM=M/1/2pΩ<SUP>2</SUP>R<SUB>2</SUB><SUP>5</SUP>=π/Rer·R<SUB>2</SUB>/h [1- (R<SUB>1</SUB>/R<SUB>2</SUB>) <SUP>4</SUP>] <BR>(3) When the mass flow rate is smaller than a certain value, adverse flow occurs near outlet. <BR>Incorporation of those theoretical analysis results into the design of the dispersion part of a high-performance disperser was found to improve the dispersion efficiency.
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