Fundamental Characteristics of Stationary Plasma Arc in Gas Tunnel(Welding Physics, Process & Instrument)
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The stationary plasma arc in gas tunnel has been investigated and the characteristics are clarified experimentally. At first the mechanism of the formation of gas tunnel by strong vortex flow with big flow rate was studied theoretically. And on the pressure distribution in the vortex chamber, the results showed good agreement with the experimental results in the annular region of the vortex chamber. The plasma arc produced in this gas tunnel has high temperature and high electron density as compared with conventional plasma arc, because of strong thermal pinch effect. The characteristics of this plasma arc has been mainly carried out by spectroscopic measurement. As the result almost fully ionized plasma has been obtained in gas tunnel at even small current of 200 A, by means of shortening the vortex chamber length.
- Transactions of JWRI
Transactions of JWRI 13(2), 173-180, 1984-12