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

被引：54

作者：

Rallabandi A.P. ^{[1
]}

Liu Y.-H. ^{[2
]}

Han J.-C. ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Turbine Heat Transfer Laboratory, Texas A and M University, College Station

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

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 30 条

[1]

Metzger D., Haley S., Heat Transfer Experiments and Flow Visualization for Arrays of Short Pin Fins, (1982)

[2]

Goldstein R., Chyu M., Hain R., Measurement of Local Mass Transfer on a Surface in the Region of the Base of a Protruding Cylinder With a Computer-Controlled Data Acquisition System, Int. J. Heat Mass Transfer, 28, 5, pp. 977-985, (1985)

[3]

Chyu M.K., Natarajan V., Heat Transfer on the Base Surface of Three-Dimensional Protruding Elements, Int. J. Heat Mass Transfer, 39, pp. 2925-2935, (1996)

[4]

VanFossen G., Heat Transfer Coefficients for Staggered Arrays of Short Pin Fins, (1981)

[5]

Chyu M., Hsing Y., Natarajan V., Convective Heat Transfer of Cubic Fin Arrays in a Narrow Channel, ASME J. Turbomach., 120, pp. 362-367, (1998)

[6]

Metzger D., Fan C., Haley S., Effects of Pin Shape and Array Orientation on Heat Transfer and Pressure Loss in Pin Fin Arrays, Journal of engineering for power, 106, 1, pp. 252-257, (1984)

[7]

Ames F.E., Dvorak L.A., Turbulent Transport in Pin Fin Arrays: Experimental Data and Predictions, ASME J. Turbomach., 128, 1, pp. 71-81, (2006)

[8]

Chyu M.K., Hsing Y.C., Shih T.I.-P., Natarajan V., Heat Transfer Contributions of Pins and Endwall in Pin-Fin Arrays: Effects of Thermal Boundary Condition Modeling, ASME J. Turbomach., 121, pp. 257-263, (1999)

[9]

Metzger D., Shepard W., Haley S., Row Resolved Heat Transfer Variations in Pin-Fin Arrays Including Effects of Non-Uniform Arrays and Flow Convergence, (1986)

[10]

Chyu M., Heat-Transfer and Pressure-Drop for Short Pin-Fin Arrays With Pin-Endwall Fillet, ASME J. Heat Transfer, 112, 4, pp. 926-932, (1990)

← 1 2 3 →