Plasma length on characteristics of DC argon plasma torch arc

Abstract

The effect of the plasma length on the characteristics of a DC argon plasma torch arc generated by a transfer-type plasma torch (ISET-PSA, Atlanta I (1995) 13) has been investigated for treatment of waste. The voltage gradient of the plasma torch arc was measured to be about 3–4 V/cm. It remains almost constant with the plasma length. The central temperature increases with the current and decreases with the plasma length. The radial temperature distribution becomes flatter when the current increases and the sectional position moves away from the torch surface.