ELECTRODE EROSION IN HIGH CURRENT ELECTRIC ARCS.
Abstract
Methods were developed to measure the anode heat flux and current densities of high-current-pulsed arcs. The heat flux density was determined by measuring the time from striking an arc to the onset of surface melting. Data was taken using argon and nitrogen with different metals and pressures. The anode heat flux density was found to be between 10,000 to 1,000,000 W/sq cm for arc currents of 50 to 2000 amps; these values increased with increasing arc current and gas pressure and were higher in nitrogen than in argon. The current density was measured by a split anode. The maximum current density was found to be 55000 A/sq cm in air at atmospheric pressure, a current of 1200 amps. The surface conditions were found to have a strong effect on anode erosion. In addition, high-speed movie pictures were used to study the arc and its erosion spot. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1970
- Accession Number
- AD0709889
Entities
People
- K. T. Shih
Organizations
- General Dynamics