Studies of confined high-pressure discharges in an electrothermal capillary

Author

Benson, David A. ; Kempka, Steven N.

Author_Institution

Sandia Nat. Lab., Albuquerque, NM, USA

Volume

29

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

544

Lastpage

549

Abstract

Experimental measurements and numerical analyses for a series of capillary discharge tests are reported. The tests are conducted in a high-pressure vessel with an instrumented polyethylene-lined capillary that injects into a small, constant-volume and pressure-instrumented chamber. A sequence of tests in which the capillary radius is varied by a factor of 5 and in which the capillary power dissipation levels are varied is discussed. The results obtained show that significant radial temperature gradients can be expected at high power levels or for low flow rates from the capillary. The results show that the use of blackbody heat fluxes based on the plasma core temperature should not be used to estimate wall heat fluxes in an electrothermal chemical system

Keywords

capillarity; discharges (electric); plasma diagnostics; plasma inertial confinement; plasma pressure; plasma temperature; blackbody heat fluxes; capillary discharge tests; capillary power dissipation levels; capillary radius; confined high-pressure discharges; electrothermal capillary; electrothermal chemical system; flow rates; high-pressure vessel; numerical analyses; plasma core temperature; polyethylene-lined capillary; pressure-instrumented chamber; radial temperature gradients; Arc discharges; Combustion; Control systems; Electrothermal effects; Heat transfer; Plasma chemistry; Plasma materials processing; Plasma temperature; Pulse power systems; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.195634

Filename

195634