粒子群の水平管内空気輸送に関する研究

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  • Research on the Pneumatic Conveyance of Densely Concentrated Solid Particles in a Horizontal Pipe
  • リュウシグン ノ スイヘイ カンナイ クウキ ユソウ ニ カンスル ケンキュウ

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The conveying state of concentrated particles changes sensitively according to the local concentration of the particles ; namely, with the increase of the local concentration of particles the acceleration factor of particle "κ" decreases rapidly. Firstly, the new constant denoting the concentration of particles "m" modified from the mixing ratio "μ" by taking account of the specific weights and the velocities of air and particle, and the distribution of particles in vertical direction, is defined. Secondarily, from the experimental results on the spread positions of particles the decreases of the acceleration factor κ/κ0 are measured, where κ0 stands for the acceleration factor for single particle. From the above investigations, the following empirical formula is obtained.[numerical formula] By using the above formula, we can presume the velocity of concentrated particles and clogging of the pipe.

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