Accession Number : AD0278570

Title :   AN INVESTIGATION OF THE ANODE LOSSES IN ARGON ARCS AND THEIR REDUCTION BY TRANSPIRATION COOLING

Corporate Author : MINNESOTA UNIV MINNEAPOLIS HEAT TRANSFER LAB

Personal Author(s) : SCHOECK, PETER A. ; ECKERT, ERNEST R.G. ; WUTZKE, STEVE A.

Report Date : APR 1962

Pagination or Media Count : 1

Abstract : The nature of the energy transfer at the anode was investigated. The contribution of the various energy transfer phenomena (convective heat transfer, radiative heat transfer and energy transfer by electrons to the total energy flow into the anode surface) were determined. The flow field in the arc resulting from electromagnetic forces was investigated. The radial distribution of heat flux and current at the anode surface was measured for currents between 50 A and 150 at various electrode spacings. The reduction of energy losses to the anode was also investigated. For this purpose, a porous carbon plug of 0.5 in. diameter was used, through which argon was injected into the arc. It was found that by a suitable design of the anode holder the anode losses could be reduced to less than 20% of the total arc energy (compared with approximately 80% for water-cooled metal anodes). The dependence of arc voltage on gas injection rate through the anode surface was measured for a number of electrode spacings. (Author)

Descriptors :   ANODES, ARGON, HEAT TRANSFER, SWEAT COOLING.

Distribution Statement : APPROVED FOR PUBLIC RELEASE