Gas-constricted arc nozzle

Details Gas-constricted arc nozzle Gas-constricted arc nozzle

1986-01-31

1987-06-16

Goldberg, E. A.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219 69M, 219121PE, 219 69R, B23K 900

Patent

active

046737928

ABSTRACT:
An electric-arc discharge device includes an annular gas-flow nozzle surrounding the discharge electrode, the nozzle being configured for discharging gas flows at trans-sonic to supersonic velocity, with circumferential uniformity of the gas flow around the axis of the electrode, and directed downstream to surround and radially inwardly confine and shape the arc. The trans-sonic speeds of gas discharge are the result of special annular gas-nozzle design and suitable pressure of gas supply thereto, whereby a region of criticality characterizes gas flow within the nozzle, i.e., prior to discharge at trans-sonic speeds, the discharge being around the electrode and with such thrusting momentum as to establish shaping confinement and directional stability of the region of electric-arc development.

REFERENCES:
patent: 3839618 (1974-10-01), Muehlberger
patent: 4234779 (1980-11-01), Willems
patent: 4300033 (1981-11-01), Scarton et al.
patent: 4385941 (1983-05-01), Daiker et al.

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