Effect of curvature ratio on thermal mixing characteristics in a T-junction area which has a 90-degree bend in the upstream area

Kazuhisa Yuki, Yu Tajima, Saburo Toda, Hidetoshi Hashizume, Toshiharu Muramatsu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Thermal mixing characteristics in a T-junction area which has different type of 90-degree bend in the upstream area are evaluated in order to clarify the effect of the curvature ratio on the fluid mixing and wall-temperature fluctuation. The fluid mixing states at some velocity ratios are visualized with PIV measuring system first and its characteristics are associated with the temperature fluctuation data in the vicinity of wall measured with thin thermocouples. It is clarified that the curvature ratio of 90-degree bend strongly affects the thermofluid mixing state, and different effects on the temperature fluctuation depending on the curvature ratio are confirmed. Especially, there is a possibility that the low curvature ratio of bend, in which a separation occurs, is useful for the control of the wall temperature fluctuation due to the strong turbulent mixing effect.

Original languageEnglish
Pages (from-to)3142-3149
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume70
Issue number700
DOIs
Publication statusPublished - 2004 Dec

Keywords

  • 90-Degree Bend
  • Fluid Mixing
  • Secondary Flow
  • Temperature Fluctuation
  • Thermal Fatigue

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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