0
RESEARCH PAPERS

Transpiration Cooling of the Constrictor Walls of an Electric High-Intensity Arc

[+] Author and Article Information
J. Heberlein, E. Pfender

Department of Mechanical Engineering, Heat Transfer Division, University of Minnesota, Minneapolis, Minn.

J. Heat Transfer 93(2), 146-154 (May 01, 1971) (9 pages) doi:10.1115/1.3449776 History: Received February 24, 1970; Revised August 20, 1970; Online August 11, 2010

Abstract

In this paper transpiration cooling of a porous tube exposed to a high-temperature plasma is discussed. The plasma is generated by a high-intensity d-c arc which reaches a thermally and hydrodynamically fully developed state in the porous constrictor tube. From an energy balance over a tube cross section in this regime using a semiempirical relationship between pressure drop and mass flow rate across the porous wall, the temperature distribution in the porous material as well as local heat fluxes are determined. Properties of the porous material which are of particular importance for the performance of a transpiration-cooled arc arc determined independently. The experiments provide a check on the reliability of these data. Analytical predictions of arc and constrictor performance are compared with experimental results. A large discrepancy exists in most of the results which is mainly attributed to turbulent-flow components in the tube which, in turn, can be confirmed by other diagnostic measurements. Finally, various sources for possible errors are discussed and the limitations imposed on the performance of a transpiration-cooled arc by imperfections of porous materials and the technology involved are indicated.

Copyright © 1971 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

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