Heat transfer in radially rotating pin - Fin channel at high rotation numbers

Shyy-Woei Chang, T. L. Yang, G. F. Hong, Tong Miin Liou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


Endwall heat transfer measurements for a radially rotating rectangular pin-fin channel with the width-to-height ratio (aspect ratio) of 8 are performed at the parametric conditions of 5000≤Re≤20000, 0≤Ro≤l.4 and 0.l≤Δρ/ρ≤0.21. Centerline heat transfer levels along the leading and trailing endwalls of the rotating pin-fin channel are respectively raised to 1.77-3.72 and 3.06-5.2 times of the Dittus-Boelter values. No previous attempt has examined the heat transfer performances for the pin-fin channel at such high rotation numbers. A selection of experimental data illustrates the individual and interactive Re, Ro and buoyancy number (Bu) effects on heat transfer. Spanwise heat transfer variations between two adjoining pin rows are detected with the averaged Nusselt numbers (Nu) determined. A set of empirical equations that calculates Nu values over leading and trailing endwalls in the developed flow region is derived to correlate all the heat transfer data generated by this study and permits the evaluation of interactive and individual effects of Re, Ro and Bu on Nu. With the aid of the Nu correlations derived, the operating conditions with the worst heat transfer scenarios for this rotating pin-fin channel are identified.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Turbo Expo
Subtitle of host publicationPower for Land, Sea, and Air
Number of pages11
EditionPART A
Publication statusPublished - 2008 Dec 1
Event2008 ASME Turbo Expo - 2008 ASME Turbo Expo, Germany
Duration: 2008 Jun 92008 Jun 13

Publication series

NameProceedings of the ASME Turbo Expo
NumberPART A


Other2008 ASME Turbo Expo
City2008 ASME Turbo Expo

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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