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

被引：53

作者：

Rallabandi, Akhilesh P. ^{[1
]}

Liu, Yao-Hsien ^{[2
]}

Han, Je-Chin ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A and M University, College Station, TX 77843-3123, United States

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

来源：

Journal of Thermal Science and Engineering Applications | 2011年 / 3卷 / 02期

关键词：

Rotation - Reynolds number - Fins (heat exchange);

D O I：

10.1115/1.4003746

中图分类号：

学科分类号：

摘要：

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. © 2011 American Society of Mechanical Engineers.

引用

共 50 条

[1] HEAT TRANSFER IN TRAILING EDGE WEDGE-SHAPED PIN-FIN CHANNELS WITH SLOT EJECTION UNDER HIGH ROTATION NUMBERS
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