Accession Number:

ADA009626

Title:

Thermoelectric Corrections on the Energy Transport Across Plasma-Solid Interfaces,

Descriptive Note:

Corporate Author:

COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1974-06-01

Pagination or Media Count:

76.0

Abstract:

The amount of plasma energy contained in the free-stream column and stagnation interfaces in direct contact with cooled tungsten electrodes of a direct-current, atmospheric argon arc has been corrected taking into account the thermoelectric effect of a partially ionized plasma. The thermoelectric correction factors to be assessed for the conventional thermal conductivities of fully ionized plasma have been tabulated as a function of the equilibrium temperature of argon at atmospheric pressure. The density diffusion contribution of the thermal conductivity has been calculated. The corrected full-field reduced thermal conductivity has been used for the calculation of the radial temperature profiles corresponding to the axial electron temperatures which were measured by a Thomson scattering experiment. The axial electric field intensity and current density could be determined correctly from the calculated radial temperature profiles and photographic observation of the arc. At the arc-electrode interface the state of plasma is treated by a two-temperature gas model. Comprehensive formula useful for the calculations of both the anode and cathode fall energy transfer modes are presented.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE