Dual toroidal electrodes

Details Dual toroidal electrodes Dual toroidal electrodes

1987-10-13

1989-02-07

Buczinski, Stephen C.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

B23K 916

Patent

active

H00005878

ABSTRACT:
An arc heater having dual toroidal rear electrodes is disclosed. In this configuration, the total arc current can be doubled without increasing the rear electrode erosion that would result with a single rear electrode. Alternatively, the total arc current can remain the same, and be divided over the two rear electrodes, and the rear electrode erosion is significantly reduced. In the first instance the gas enthalpy performance of the heater is significantly enhanced, and in the second instance the heated gas contamination is reduced and the rear electrode life is increased. The basic components of the arc heater are a forward electrode and dual rear electrodes, the forward and dual rear electrodes being separated from each other by cylindircal multi-segment non-axial conducting constrictor modules. Provision is made for gas injection throughout the device. By regulating the air flow distribution and by injecting gas through the rear interelectrode slot the dual anodes of the arc generated are contained to the interface region of the dual rear electrodes.

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