鉛直管における旋回流空気輸送の研究 : 動力係数と付加圧力損失

概要

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An experimental study is carried out for a swirling flow pneumatic conveying system in a vertical pipeline in terms of the power consumption and additional pressure drop. The test section consists of a pipeline 12m in height with an inside diameter of 80 mm. The three initial swirl numbers from 0.58 to 1.12, the average gas velocities from 9 to 23m/s and the solid-gas ratios from 1.5 to 23 were investigated. Polystyrene, polyethylene and polyvinyl pellets with mean diameters of 1.7, 3.1 and 4.3 mm, respectively, were transported as test particles. It is found that the critical and minimum gas velocities of swirling flow pneumatic conveying were lower than those of axial flow pneumatic conveying, the maximum reduction rates being 13% and 20%, respectively. In the lower gas velocity range, the power consumption and additional pressure drop were decreased by the swirling flow pneumatic conveying.
一般社団法人日本機械学会の論文
1994-03-25