Heat transfer in trailing edge wedge-shaped pin-fin channels with slot ejection under high rotation numbers

Akhilesh P. Rallabandi*, Yao-Hsien Liu, Je Chin Han

*Corresponding author for this work

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

The heat transfer characteristics of a rotating pin-fin roughened wedge-shaped channel have been studied. The model incorporates ejection through slots machined on the narrower end of the wedge, simulating a rotor blade trailing edge. The copper plate regional average method is used to determine the heat transfer coefficient; pressure taps have been used to estimate the flow discharged through each slot. Tests have been conducted at high rotation (≈1) and buoyancy (≈2) numbers, in a pressurized rotating rig. Reynolds numbers investigated range from 10,000 to 40,000 and inlet rotation numbers range from 0 to 0.8. Pin-fins studied are made of copper. Results show high heat transfer in the proximity of the slot. A significant enhancement in heat transfer due to the pin-fins, compared with a smooth channel, is observed. Results also show a strong rotation effect, increasing significantly the heat transfer on the trailing surface and reducing the heat transfer on the leading surface.

Original languageEnglish
Article number021007
JournalJournal of Thermal Science and Engineering Applications
Volume3
Issue number2
DOIs
StatePublished - 22 Jul 2011

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