Measurements of Velocity and Concentration in Transiet Jets by LDV and Rayleigh Scattering

• TAKAGI Toshimi

• OKAMOTO Tatsuyuki

• OHTANI Akihiro

• KOMIYAMA Masaharu

抄録

The flow and mixing in transient laminar jets of CO₂ emitted into an N₂ stream were experimentally studied. Time-and space-resolved measurements of velocity and concentration were made by a laser Doppler velocimeter and by the laser Rayleigh scattering method in transient jets, together with visual studies by Schlieren photography. The results obtained are as follows. (1) Axisymmetric large scale ring vortices are formed successively in the jet and travel downstream. (2) Out ward or inward radial flow is induced downstream or upstream of each ring vortex, respectively. The vortex has the velocity of solid body rotation in the central part, and free vortex in the outer part of the vortex. (3) The surrounding gas (N₂) is engulfed by the vortex to form the laminated layer which enhances micro-mixing in the molecular scale.

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 31 (1), 119-126, 1988

  一般社団法人 日本機械学会

キーワード

• Unsteady flow
• Flow measurement
• Mass transfer
• Transient gas jet
• Vortex formation
• Concentration
• LDV
• Rayleigh scattering

詳細情報

• CRID: 1390001205426486016
• NII論文ID: 110002494155
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.31.1_119
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/31/1/31_1_119/_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