鉛直矩形管内気液二相気泡流中における物体周りの流れ : 物体形状,アスペクト比の影響(流体工学,流体機械)  [in Japanese] Behavior of Flow around Obstacle in Vertical Gas-Liquid, Bubbly Two-Phase Flow : Effects of Geometry and Aspect Ratio of Obstacle  [in Japanese]

Abstract

An experimental study on the effects of geometry and aspect ratio of obstacle on the flow characteristics around the obstacle in a vertical upward bubbly two-phase cross-flow is described. It showed that Karman vortex was shed periodically under most experimental flow conditions for rectangular cylinders with blockage ratio β of 1/3, while it was shed irregularly when void fraction was α≳10% for circular cylinder. Its effects on the vortex shedding frequency ƒ, pressure difference ?P between the front and rear sides of cylinder etc. were also discussed. Two experimental equations were found to express the relations between the drag force exerted on the cylinder and ?P for square cylinder and circular cylinder, respectively.

Journal

Transactions of the Japan Society of Mechanical Engineers. B   [List of Volumes]

Transactions of the Japan Society of Mechanical Engineers. B 68(672), 2240-2246, 2002-08-25  [Table of Contents]

The Japan Society of Mechanical Engineers

References:  8

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Cited by:  3

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Codes

  • NII Article ID (NAID) :
    110002387411
  • NII NACSIS-CAT ID (NCID) :
    AN00187441
  • Text Lang :
    JPN
  • Article Type :
    Journal Article
  • ISSN :
    03875016
  • NDL Article ID :
    6273593
  • NDL Source Classification :
    ZN11(科学技術--機械工学・工業)
  • NDL Call No. :
    Z16-109
  • Databases :
    CJP  CJPref  NDL  NII-ELS