Analysis of Turbulent Flow in Wall-Stabilized Arc Discharges.
Final scientific rept. 1 Feb 72-1 Apr 73,
RCA RESEARCH LABS STE ANNE DE BELLEVUE (QUEBEC)
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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
- Plasma Physics and Magnetohydrodynamics