Torch Plasma Arc Mode Under High Cross Wind

Abstract

This paper investigates a behavior of a transferred plasma arc exposed to a cross airflow. The torch plasma behavior was observed, and the deflection on the anode surface was measured. The deflection on the anode surface increased with increasing velocity of the cross wind. From new phenomenon, it has been found that the torch plasma arcs have abundant elasticity. Moreover, the input plasma power with the cross-wind velocity was also studied.

Evolution of magnetically rotating arc into large area arc plasma

“…The arc plasma fans out in the chamber, and its expansion is against the rotational direction. This phenomenon is similar to the torch plasma arc mode under a cross wind [19,20] as shown in Fig. 4(b).…”

“…Previous research reveals that there is a critical value of cross-wind velocity (∼ 10 m/s), at which the arc expands greatly to a large scale plasma. [19] The magnetic field drives the arc moving in the 𝐽 × 𝐵 direction. The moving velocity, which is on the order of ∼10 2 m/s, is probably higher than the critical cross-wind velocity.…”

“…4. (a) Consecutive images of arc plasma with I = 130 A, B = 0.04 T, flow rate = 3 Nm 3 /h, 0.5-µs shutter, 3000 fps, and (b) typical mode of torch plasma arc with lateral gas velocity (v) [19,20].…”

Numerical study of the effect of coflow argon jet on a laminar argon thermal plasma jet

“…The various flow configurations of thermal plasma, including free jets [1][2][3], coflow jets, transverse jets [4][5][6] and counter flows [7][8][9], etc, have been widely used in industrial applications. As one of the basic flow configurations, thermal plasma jets integrated with coflow argon jets have been widely used in welding, cutting, spraying and material preparation, and so on.…”