0
RESEARCH PAPERS: Heat Pipes

Instability of Heat Pipe Performance at Large Axial Accelerations

[+] Author and Article Information
A. Asias, A. Leitner, A. Nabi

 Rafael Ltd, P.O.B. 2250, Haifa 31021, Israel

M. Shusser1

 Faculty of Mechanical Engineering, Technion, Haifa 32000, Israel

G. Grossman

 Faculty of Mechanical Engineering, Technion, Haifa 32000, Israel

1

Corresponding author.

J. Heat Transfer 129(2), 137-140 (Apr 09, 2006) (4 pages) doi:10.1115/1.2402177 History: Received October 09, 2005; Revised April 09, 2006

To investigate the feasibility of using heat pipes in airborne systems, heat pipe performance at large axial accelerations in the range of 3–12g was studied experimentally. The heat input chosen corresponded to the optimal heat pipe performance without acceleration. When applied against the direction of the liquid flow (unfavorable orientation) the accelerations were large enough to exceed the capillary limit, as was seen from the strong increase in the evaporator temperature. The influence of accelerations in the direction of the liquid flow (favorable orientation) was found to be more complicated. While at the acceleration of 3g the heat pipe performance improved, at higher accelerations instability developed with resulting large-amplitude oscillations of the evaporator temperature. The instability found in these experiments is thought to be related to the geyser effect observed in thermosyphons.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Thermal resistance versus heat input. No acceleration.

Grahic Jump Location
Figure 2

Heater, evaporator, and condenser temperatures for unfavorable acceleration of 3g

Grahic Jump Location
Figure 3

Heater, evaporator, and condenser temperatures for favorable acceleration of 3g

Grahic Jump Location
Figure 4

Heater, evaporator, and condenser temperatures for favorable acceleration of 6g

Grahic Jump Location
Figure 5

Heater, evaporator, and condenser temperatures for favorable acceleration of 9g

Grahic Jump Location
Figure 6

Heater, evaporator, and condenser temperatures for favorable acceleration of 12g

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In