Heat/mass transfer in rotating impingement/effusion cooling with rib turbulators

Sung Kook Hong, Dong Hyun Lee, Hyung Hee Cho

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A detailed measurement of the heat/mass transfer coefficients on the ribbed surfaces for the rotating impingement/effusion cooling system has been conducted. Three different jet orientations (front, leading, and trailing) were investigated at the same rotating speed and impinging jet Reynolds number of 3000. A naphthalene sublimation method was used to obtain local heat/mass transfer coefficients. Regardless of rib turbulators, the leading and trailing orientations lead to totally changed heat/mass transfer distributions due to the jet deflection, while the Sh distributions of the front orientation were similar to those of the stationary case. For leading and trailing orientations, the influence of crossflow, which deflected wall jets, decreased due to the blockage effect of the rib turbulators. Therefore, the wall jets spread more widely and the interaction between adjacent wall jets along spanwise direction became stronger, enhancing the heat/mass transfer compared to that on smooth surface.

Original languageEnglish
Pages (from-to)3109-3117
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume52
Issue number13-14
DOIs
Publication statusPublished - 2009 Jun 1

Fingerprint

impingement
wall jets
mass transfer
Mass transfer
Cooling
cooling
heat
cooling systems
coefficients
sublimation
naphthalene
deflection
Reynolds number
Sublimation
Naphthalene
Cooling systems
Hot Temperature
interactions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "A detailed measurement of the heat/mass transfer coefficients on the ribbed surfaces for the rotating impingement/effusion cooling system has been conducted. Three different jet orientations (front, leading, and trailing) were investigated at the same rotating speed and impinging jet Reynolds number of 3000. A naphthalene sublimation method was used to obtain local heat/mass transfer coefficients. Regardless of rib turbulators, the leading and trailing orientations lead to totally changed heat/mass transfer distributions due to the jet deflection, while the Sh distributions of the front orientation were similar to those of the stationary case. For leading and trailing orientations, the influence of crossflow, which deflected wall jets, decreased due to the blockage effect of the rib turbulators. Therefore, the wall jets spread more widely and the interaction between adjacent wall jets along spanwise direction became stronger, enhancing the heat/mass transfer compared to that on smooth surface.",
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Heat/mass transfer in rotating impingement/effusion cooling with rib turbulators. / Hong, Sung Kook; Lee, Dong Hyun; Cho, Hyung Hee.

In: International Journal of Heat and Mass Transfer, Vol. 52, No. 13-14, 01.06.2009, p. 3109-3117.

Research output: Contribution to journalArticle

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