The Fluid Mechanics of Capsule Pipelines : 2nd Report, Analysis of the Pressure Loss in Concentric Capsules, Pipelines and Annular Pipes

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概要

• 論文の詳細を見る

• This paper presents the theoretical and experimental results obtained by a study of cylindrical capsules traveled concentrically in pipeline. Considering the total pressure loss of a capsule flow to be established by friction drag and pressure drag, the authors make them clear respectively from both a theoretical and an experimental study. In particular, the flow in the annular section of a capsule is approximated by the flow through annular pipes when the inner pipe moves. Then a general formula, concerned with the pressure loss due to friction drag in a turbulent flow regime for the moving concentric annuli, is derived by taking account of the one-seventh power law for an axial velocity profile and the boundary-layer characteristics on pipe walls. In conclusion, it is confirmed that the capsule velocity as well as the total pressure loss can be estimated with reasonable accuracy.

• 一般社団法人日本機械学会の論文

著者

• Ohashi Akira

  Konoike Construction Co. Ltd.

• YANAIDA Katsuya

  Osaka Prefectural Technical College

関連論文

• The Fluid Mechanics of Capsule Pipelines : 2nd Report, Analysis of the Pressure Loss in Concentric Capsules, Pipelines and Annular Pipes
• The Fluid Mechanics of Capsule Pipelines : 3rd Report. Analysis of the Pressure Loss in Eccentric Capsules Pipelines and Eccentric Annular Pipes
• The Fluid Mechanics of Capsule Pipelines : 1st Report, Analysis of the Required Pressure Drop for Hydraulic and Pneumatic Capsules

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