Anode Attachment and Received Heat of Argon Torch Plasma with High Lateral Air as Function of Current

Abstract

The torch plasma arc has useful characteristics of high energy and high current. And the mode of torch plasma arc can be flexible, even if the arcs is exposed to the lateral gas. In this paper, we measured the input power, heat power, and heat efficiency of the torch plasma arc to the anode in order to know the current effect on the anode attachment of plasma torch arc with the high lateral air velocity, varying from 0 to 80m/s at the plasma Ar flow rate of 12slm. As a result, the input power increases with lateral gas velocity such as about 8,000W to 16,000W and the heat efficiency decreases with the lateral gas velocity such as about 50% to 25% at the current I = 150A and appearance plasma length La = 1cm. These results could be applied to providing the electrical power from the ground to high-speed mobiles, v.v., and to reducing an anode surface erosion by the anode spot movement.