Effects of bleed flow and angled ribs on heat transfer distributions in a rotating square channel

Suk Hwan Park, Yun Heung Jeon, Kyung Min Kim, Dong Hyun Lee, Hyung Hee Cho

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The present study investigated the effects of channel rotation and bleed flow on heat/mass transfer in a square channel with 45° rib turbulators. The bleed holes were located between the rib turbulators on the leading surface and those on the trailing surface case by case. The tests were conducted under the conditions of various bleed ratios (0.0, 0.2, 0.4) and rotation numbers (0.0, 0.2, 0.4) at Re= 10,000. The results suggested that heat/mass transfer characteristics were influenced by the Coriolis force, decrement of main flow rate, secondary flow by angled ribs and bleed hole location. As the bleed ratio (BR) increased, the heat/mass transfer decreased on both surfaces due to the reduction of main flow rate. With increment of the rotation number, heat/mass transfer also decreased and almost the same because the reattachment of the secondary flow induced by angled ribs was weakened on the leading surface and the secondary flow was disturbed on the trailing surface by the Coriolis force.

Original languageEnglish
Pages (from-to)76-82
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, B
Volume31
Issue number1
DOIs
Publication statusPublished - 2007 Jan 1

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Heat transfer
Secondary flow
Mass transfer
Coriolis force
Flow rate
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "The present study investigated the effects of channel rotation and bleed flow on heat/mass transfer in a square channel with 45° rib turbulators. The bleed holes were located between the rib turbulators on the leading surface and those on the trailing surface case by case. The tests were conducted under the conditions of various bleed ratios (0.0, 0.2, 0.4) and rotation numbers (0.0, 0.2, 0.4) at Re= 10,000. The results suggested that heat/mass transfer characteristics were influenced by the Coriolis force, decrement of main flow rate, secondary flow by angled ribs and bleed hole location. As the bleed ratio (BR) increased, the heat/mass transfer decreased on both surfaces due to the reduction of main flow rate. With increment of the rotation number, heat/mass transfer also decreased and almost the same because the reattachment of the secondary flow induced by angled ribs was weakened on the leading surface and the secondary flow was disturbed on the trailing surface by the Coriolis force.",
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Effects of bleed flow and angled ribs on heat transfer distributions in a rotating square channel. / Park, Suk Hwan; Jeon, Yun Heung; Kim, Kyung Min; Lee, Dong Hyun; Cho, Hyung Hee.

In: Transactions of the Korean Society of Mechanical Engineers, B, Vol. 31, No. 1, 01.01.2007, p. 76-82.

Research output: Contribution to journalArticle

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