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 and buoyancy 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.
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e-mail: akhlsh@tamu.edu
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June 2011
Research Papers
Heat Transfer in Trailing Edge Wedge-Shaped Pin-Fin Channels With Slot Ejection Under High Rotation Numbers
Akhilesh P. Rallabandi,
e-mail: akhlsh@tamu.edu
Akhilesh P. Rallabandi
Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A&M University, College Station
, TX 77843-3123
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Yao-Hsien Liu,
e-mail: yhliu@mail.nctu.edu.tw
Yao-Hsien Liu
Department of Mechanical Engineering, National Chiao-Tung University
, Hsinchu 30010, Taiwan
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Je-Chin Han
e-mail: jc-han@tamu.edu
Je-Chin Han
Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A&M University, College Station
, TX 77843-3123
Search for other works by this author on:
Akhilesh P. Rallabandi
Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A&M University, College Station
, TX 77843-3123e-mail: akhlsh@tamu.edu
Yao-Hsien Liu
Department of Mechanical Engineering, National Chiao-Tung University
, Hsinchu 30010, Taiwan
e-mail: yhliu@mail.nctu.edu.tw
Je-Chin Han
Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A&M University, College Station
, TX 77843-3123e-mail: jc-han@tamu.edu
J. Thermal Sci. Eng. Appl. Jun 2011, 3(2): 021007 (9 pages)
Published Online: July 22, 2011
Article history
Received:
July 22, 2010
Accepted:
February 27, 2011
Online:
July 22, 2011
Published:
July 22, 2011
Citation
Rallabandi, A. P., Liu, Y., and Han, J. (July 22, 2011). "Heat Transfer in Trailing Edge Wedge-Shaped Pin-Fin Channels With Slot Ejection Under High Rotation Numbers." ASME. J. Thermal Sci. Eng. Appl. June 2011; 3(2): 021007. https://doi.org/10.1115/1.4003746
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