Cathode spots on metallic electrodes under the conditions of the channel of an MHD generator

Journal Article · Fri Jul 01 00:00:00 EDT 1977 · High Temp. (USSR) (Engl. Transl.); (United States)

OSTI ID:7283552

Beilis, I I; Zalkind, V I; Tikhotskii, A S

The article discusses cathode processes of an arc discharge under the conditions of the channel of an MHD generator, a special characteristic of of which is the deposition of a layer of additive on the surface of the metallic electrode. It gives a theoretical description of the above kind of discharge, in accordance with which a spot burns as the result of the vaporization of a previously deposited film of additive, while the temperature of the spot is determined by the thermal conductivity of the metallic cathode. For a copper cathode, the article gives calculations of the radius and the temperature of the spots as a function of the mean temperature of the surface of the electrode, arising as a result of its heating by a stream of hot gas. The results of calculations are in good agreement with the corresponding experimental data.

• Research Organization: High-Temperature Institute, Academy of Sciences of the USSR
• OSTI ID: 7283552
• Journal Information: High Temp. (USSR) (Engl. Transl.); (United States), Journal Name: High Temp. (USSR) (Engl. Transl.); (United States) Vol. 15:1; ISSN HITEA
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300104* -- MHD Generators-- Duct Engineering & Fluid Dynamics
CONTAMINATION
COPPER
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTRIC DISCHARGES
ELECTRODES
ELEMENTS
METALS
MHD CHANNELS
MHD GENERATORS
PHYSICAL PROPERTIES
SURFACE COATING
SURFACE CONTAMINATION
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS