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Technical Briefs

Robust Thermal Performance of a Flat-Plate Oscillating Heat Pipe During High-Gravity Loading

[+] Author and Article Information
S. M. Thompson, A. A. Hathaway, C. D. Smoot, C. A. Wilson

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

H. B. Ma1

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

R. M. Young, L. Greenberg, B. R. Osick, S. Van Campen

 Northrop Grumman Corporation, Linthicum, MD 21090

B. C. Morgan, D. Sharar, N. Jankowski

 U.S. Army Research Laboratory, Adelphi, MD 20783

1

Corresponding author.

J. Heat Transfer 133(10), 104504 (Aug 19, 2011) (5 pages) doi:10.1115/1.4004076 History: Received January 20, 2011; Accepted April 13, 2011; Published August 19, 2011; Online August 19, 2011

The thermal performance of a miniature, three-dimensional flat-plate oscillating heat pipe (3D FP-OHP) was experimentally investigated during high-gravity loading with nonfavorable evaporator positioning. The heat pipe had dimensions of 3.0 × 3.0 × 0.254 cm3 and utilized a novel design concept incorporating a two-layer channel arrangement. The device was charged with acetone and tested at a heat input of 95 W within a spin-table centrifuge. It was found that the heat pipe operated and performed near-independent of the investigated hypergravity loading up to 10 g. Results show that at ten times the acceleration due to gravity (10 g), the effective thermal conductivity was almost constant and even slightly increased which is very different from a conventional heat pipe. The gravity-independent heat transfer performance provides a unique feature of OHPs.

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Figures

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Figure 1

Three-dimensional flat-plate oscillating heat pipe

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Figure 2

Schematic of experimental system: (a) whole setup; (b) oscillating heat pipe with thermocouple locations; and (c) spin-table centrifuge set-up

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Figure 3

Effective thermal conductivity versus time at a constant heat input of 100 W and varying gravitational loading

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Figure 4

Average evaporator and condenser temperatures versus time during 0 g

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Figure 5

Average evaporator and condenser temperatures versus time during 1 g

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Figure 6

Average evaporator and condenser temperatures versus time during 5 g

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Figure 7

Average evaporator and condenser temperatures versus time during 10 g

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