Accession Number : AD0773193

Title :   Analysis of Turbulent Flow in Wall-Stabilized Arc Discharges.

Descriptive Note : Final scientific rept. 1 Feb 72-1 Apr 73,


Personal Author(s) : Shkarofsky,Issie P.

Report Date : NOV 1973

Pagination or Media Count : 133

Abstract : The report concerns the analysis of turbulent flow in wall-stabilized arcs. A plausible formulation is offered relating the changes in resistivity or average voltage gradient at high flow rates to the fluctuations in gas temperature and velocity. A four fold increase with flow rate in voltage gradient as observed by Frind and Damsky in an argon arc can be accounted for by a 10 to 20 percent rms fluctuation in gas temperature. The increase also depends on the ratio of electron neutral collision frequency to the total collision frequency and thus tends to become smaller as the gas becomes singly ionized. In transitions to higher order Z-ionizations, the theory predicts that the average resistivity may be slightly increased, and then with a rise in temperature it is decreased below its nonturbulence values. (Modified author abstract)

Descriptors :   *Electric arcs, *Electric discharges, *Turbulent flow, *Gas ionization, Hydrodynamics, Kinetic theory, Differential equations, Numerical analysis, Canada

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE