Heat Transfer in Trailing Edge Wedge-Shaped Pin-Fin Channels With Slot Ejection Under High Rotation Numbers-Reference-Cited by-同舟云学术

Heat Transfer in Trailing Edge Wedge-Shaped Pin-Fin Channels With Slot Ejection Under High Rotation Numbers

Published:2011-06-01 Issue:2 Volume:3 Page:
ISSN:1948-5085
Container-title:Journal of Thermal Science and Engineering Applications
language:en
Short-container-title:

Author:

Rallabandi Akhilesh P.¹,Liu Yao-Hsien²,Han Je-Chin¹

Affiliation:

1. Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A&M University, College Station, TX 77843-3123

2. Department of Mechanical Engineering, National Chiao-Tung University, Hsinchu 30010, Taiwan

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.

Publisher

ASME International

Subject

Fluid Flow and Transfer Processes,General Engineering,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/thermalscienceapplication/article-pdf/doi/10.1115/1.4003746/5715892/021007_1.pdf

Reference30 articles.

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4. VanFossen, G. , 1981, “Heat Transfer Coefficients for Staggered Arrays of Short Pin Fins,” NASA STI/Recon Technical Report No. 81.

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