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TECHNICAL PAPERS: Radiative Transfer

Experimental Investigations of Radially Rotating Miniature High-Temperature Heat Pipes

[+] Author and Article Information
Jian Ling, Yiding Cao, Alex P. Lopez

Department of Mechanical Engineering, Florida International University, Miami, FL 33199

J. Heat Transfer 123(1), 113-119 (Sep 05, 2000) (7 pages) doi:10.1115/1.1332777 History: Received June 11, 1999; Revised September 05, 2000
Copyright © 2001 by ASME
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References

Cao, Y., Ling, J., and Chang, W. S., 1998, “Analyses of Liquid and Vapor Flows in a Miniature Radially Rotating Heat Pipe for Turbine Blade Cooling Applications,” 11th International Heat and Mass Transfer Conference, South Korea.
Faghri, A., 1995, Heat Pipe Science and Technology, Taylor & Francis, Washington, DC.
Dunn, P. D., and Reay, D. A., 1994, Heat Pipe, Pergamon, Oxford, New York.
Chi, S. W., 1976, Heat Pipe Theory and Practice: a Sourcebook, Hemisphere, New York.
Cao, Y., 1996, “Rotating Micro/Miniature Heat Pipes for Turbine Blade Cooling Applications,” AFOSR Contractor and Grantee Meeting on Turbulence and Internal Flows, Atlanta, GA.
J.,  Ling, Cao,  Y., and Chang,  W. S., 1999, “Analysis of Radially Rotating High-Temperature Heat Pipes for Turbomachinery Application,” ASME J. Eng. Gas Turbines Power, 121, pp. 306–312.
Lin,  L., and Faghri,  A., 1999, “Heat Transfer in Micro Region of a Rotating Miniature Heat Pipe,” Int. J. Heat Mass Transf., 42, pp. 1363–1369.
Cao, Y., and Chang, W. S., 1997, “Analyses of Heat Transfer Limitations of Radially Rotating Heat Pipe for Turbomachinery Applications,” AIAA Paper 97-2542.
Marto, P., 1976, “Performance Characteristics of Rotating Wickless Heat Pipes,” Proc. 2nd Int. Heat Pipe Conf., Bologna, pp. 281–291.
Daniels,  T., and Al-Jumaily,  F., 1975, “Investigations of the Factors Affecting the Performance of a Rotating Heat Pipe,” Int. J. Heat Mass Transf., 18, pp. 961–973.
Gray, V. H., 1969, “The Rotating Heat Pipe-A Wickless, Hollow Shaft for Transferring Heat Fluxes,” ASME Paper 69-HT-19.
Ling,  J., and Cao,  Y., 2000, “Analytical Investigation of Diffuse Effects of Non-Condensable Gas on Radially Rotating Miniature High-Temperature Heat Pipes,” Int. J. Heat Mass Transfer, 43, pp. 3661–3671.
Faghri,  A., Buchko,  M., and Cao,  Y., 1991, “A Study of High-Temperature Heat Pipes With Multiple Heat Sources and Sinks: Part I—Experimental Methodology and Frozen Startup Profiles,” ASME J. Heat Transfer, 113, pp. 1003–1009.

Figures

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Schematic of radially rotating heat pipes
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Schematic of the high-speed rotating test apparatus
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Schematic of radially rotating miniature heat pipes (d=1.5 and 2 mm)
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Comparisons of temperature distributions and heat inputs between the experimental data, closed-form analytical solution (Lc,n=4 mm), and the heat pipe container: (a) ω2a /g=470,di=2 mm, W=6.7×10−3m3/s; (b) ω2a /g=470,di=1.5 mm, W=6.7×10−3m3/s.
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Temperature distributions along the heat pipe length with the diffuse effects of non-condensable gases during the heat pipe startup process: (a) ω2a /g=470,di=1.5 mm, Q=176 W; (b) ω2a /g=470,di=2 mm, Q=175 W.
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Temperature distributions along the dimensionless heat pipe length with different heat inputs: (a) ω2a /g=470,di=2 mm, W=6.7×10−3m3/s; (b) ω2a /g=470,di=1.5 mm, W=6.7×10−3m3/s.
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Temperature distributions along the dimensionless heat pipe length with different rotating frequencies and flow rates of the cooling air (ω2a /g=1306,di=2 mm, W=11.2×10−3m3/s)
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Comparisons of temperature distributions along the dimensionless heat pipe length with different flow rates of the cooling air: (a) ω2a /g=470,di=2 mm, Q=200 W; (b) ω2a /g=1306,di=2 mm, Q=200 W.
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Temperature distributions along the dimensionless heat pipe length with different rotating frequencies: (a) Q=225 W, di=1.5 mm; (b) Q=225 W, di=2 mm.
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Comparisons of temperature distributions along the dimensionless heat pipe length with different inner diameter: (a) Q=200 W, ω2a /g=470,W=6.7×10−3m3/s; (b) Q=200 W, ω2a /g=1881,W=13.4×10−3m3/s.

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