Anode attachment and received heat of argon torch plasma with high lateral airflow as function of current

Abstract

SUMMARYThe torch plasma arc has useful characteristics of high energy and high current. The mode of torch plasma arcs can be flexible, even if the arc 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 determine the current effect on the anode attachment of plasma torch arc with high lateral air velocity, varying from 0 to 80 m/s at a plasma Ar flow rate of 12 slm. As a result, the input power increases with lateral gas velocity such as from about 8000 W to 16,000 W and the heat efficiency decreases with the lateral gas velocity such as from about 50% to 25% at the current I = 150 A and appearance plasma length L a = 1 cm. 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.

Research on driving force and dynamic characteristics of pantograph–catenary arc

“…In contrast, due to the influence of electrode shape and relative position, the arc root jumping behavior of switching arcs and secondary arcs is generally limited to a small spatial scale [30]. Iwao et al [31][32][33] focuses on the influence of lateral airflow on torch plasma from the aspects of arc length, voltage input power, heat power and heat efficiency, which is similar and worthy of reference to the influence of airflow on PC arc during train operation, but there are still differences between PC arc and torch plasma in terms of ionic composition and arc initiation conditions. Therefore, in simulations of the PC arc, the current element acceleration cannot be ignored, and the arc root jumping characteristics need to be considered.…”