Accession Number : AD0608888

Title :   AN EXPERIMENTAL STUDY OF THE ENERGY EXCHANGE IN THE COLUMN OF AN ELECTRIC ARC WITH RADIAL GASFLOW INTERACTION.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Elliott,Harold F. ; Gomez,Raymond V.

Report Date : AUG 1964

Pagination or Media Count : 87

Abstract : An arc device is used to study the effects of radially injecting nitrogen gas into the column of a DC arc. The device consists basically of a single tungsten cathode, a six-element copper anode, and a copper constrictor with an adjustable axisymmetrical radial gas injection jet. All elements are watercooled. The assumption is made that the cathode and anode fall regions are not affected by the gas injection. The power transferred to the gas is determined by measuring the increased power input to the arc device during gas injection and making an appropriate correction for the heat lost in the constrictor. The mass flow of the nitrogen is monitored by a locally constructed coiled capillary flowmeter. Injection velocities are varied from zero to sonic. For arc powers in the range of 7-28 kw and mass flows up to 10 lbm/hr, gas enthalpies as high as 9000 Btu/lb are attained with a device efficiency up to 63 per cent. Approximate average gas temperatures are from 5300 to 7000 degrees K. The basic arc device is shown to be effective, although modification of the anode casing and the constrictor is suggested. (Author)

Descriptors :   (*ELECTRIC ARCS, ENERGY), (*ELECTRIC DISCHARGES, ENERGY), GAS FLOW, DIRECT CURRENT, NITROGEN, ENTHALPY, TEMPERATURE, HEAT TRANSFER, NOZZLE GAS FLOW, ANODES

Distribution Statement : APPROVED FOR PUBLIC RELEASE