Capsule Velocity in Pipelines

• TOMITA Yuji

• FUJIWARA Yoshinari

抄録

Capsule velocity in hydraulic and pneumatic pipelines is analyzed in its equilibrium state based on a coaxial annular flow model. The capsule is cylindrical and is assumed to move coaxially, and Coulomb friction is considered when the capsule has wheels. Properties of carrier fluid are included in a nondimensional friction parameter which consists of kinematic viscosity of fluid, density ratio, Coulomb frictional coefficient, pipe diameter and gravity acceleration. Effects of length/diameter ratio, diameter ratio and friction parameter on the capsule velocity are calculated. The maximum capsule velocity is limited by the diameter ratio. Pressure and shear forces on the capsule and a pressure drop across the capsule are also discussed, and the possibility of drag reduction due to the capsule is suggested.

収録刊行物

• JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

  JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 35 (4), 513-518, 1992

  一般社団法人 日本機械学会

キーワード

• Pipe Flow
• Pipeline
• Axisymmetric Flow
• Hydraulic Capsule
• Pneumatic Capsule
• Capsule Velocity
• Pressure Drop

詳細情報

• CRID: 1390282680401874048
• NII論文ID: 110002492681
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.35.4_513
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/35/4/35_4_513/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可