Abstract
A two-dimensional modelling is conducted concerning the effects of the arc current and the cathode-anode distance on the heat transfer and flow patterns inside a DC arc plasma furnace with opposite cathode and anode and with opposite working-gas injection. The modelling results show that a stagnation layer with zero axial velocity is formed between the cathode and anode when an appropriate parameter combination is employed. The position of the stagnation layer moves toward the anode side with increasing arc current. And the gas temperature at the stagnation point increases with increasing arc current or decreasing cathode-anode distance.
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