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Research Papers

Effect of Internal Wick Structure on Liquid-Vapor Oscillatory Flow and Heat Transfer in an Oscillating Heat Pipe

[+] Author and Article Information
Jiajun Xu, Hongbin Ma

Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211

Yuwen Zhang1

Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211zhangyu@missouri.edu

1

Corresponding author.

J. Heat Transfer 131(12), 121012 (Oct 15, 2009) (10 pages) doi:10.1115/1.3222736 History: Received January 13, 2009; Revised April 09, 2009; Published October 15, 2009

Liquid-vapor oscillating flow and heat transfer in a vertically placed oscillating heat pipe (OHP) with a sintered particle wick structure are analyzed in this paper. The oscillatory flow of the liquid slug is driven by the variations in pressures in the vapor plug due to evaporation and condensation. The evaporation and condensation heat transfer coefficients are obtained by solving the microfilm evaporation and condensation on the sintered particles. The sensible heat transfer between the liquid slug and the channel wall are obtained by analytical solution or empirical correlations depending on whether the liquid flow is laminar or turbulent. The effects of the sintered particles wick structure on the oscillatory flow, as well as sensible and latent heat transfer, are analyzed and compared with the results without wick structure. A parametric study on the oscillatory flow and heat transfer in the OHP with sintered particle wick structure is also performed.

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Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 10

Effect of different heating section temperatures on sensible and evaporative heat transfer with wick

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Figure 11

Effect of different particle sizes on liquid slug displacement, temperature and pressure of vapor plugs

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Figure 12

The effect of different particle sizes on the variation in sensible and evaporative heat transfer with wick

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Figure 2

Wick structure and evaporation/condensation occurred on sintered particles

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Figure 3

Liquid slug displacement and temperature and pressure of vapor plugs without wick

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Figure 4

Sensible and evaporative heat transfer without wick

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Figure 5

Comparison of liquid slug displacement, temperature and pressure of vapor plugs

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Figure 6

Comparison of sensible and evaporative heat transfer

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Figure 7

Effect of the inner diameter on liquid slug displacement, temperature and pressure of vapor plugs with wick

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Figure 8

Effect of the inner diameter on the sensible and evaporative heat transfer with wick

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Figure 9

Effect of different heating section temperatures on liquid slug displacement, temperature and pressure of vapor plugs with wick

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