Characteristics of Steam Flow in Non-Spherical Paricle Bed

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  • 非球形粒子層の蒸気流動特性
  • ヒ キュウケイ リュウシソウ ノ ジョウキ リュウドウ トクセイ

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Abstract

Usually, Trichloroethane has been used for the deoiling and cleaning of machine parts. But its production and import have been prohibited since 1995 because of its possibility to destroy the ozone layer. Generally for biological and environmental safety, the de-oiling should be done with the physical method instead of the chemical method. As one of the physical method, a cleaning by a steam flow in a packed bed of machine parts was proposed. Usual machine parts have complicated and non-spherical shapes. As the existing flow models are based on spherical particle beds, an experiment for non-spherical particles was conducted by using a steam. Actual rivets of different sizes were used as the non-spherical particles. Also a prediction method for the flow resistance was proposed and good agreements with the experimental results were obtained.

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