Electrical generator or motor structure – Dynamoelectric – Conducting fluid
Patent
1979-11-08
1982-02-09
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Conducting fluid
H02K 4500
Patent
active
043151698
ABSTRACT:
A staircase electrode-wall configuration for a MHD generator which uses fd dynamic means to protect the electrodes from substantial damage due to arcing and chemical attack. The electrode walls of a MHD generator duct have periodic conductor/insulator elements where channel divergence or convergence is accomplished in a stepwise fashion. The electrode is situated within the insulator of each element to be backward-facing so as not to be directly exposed to the hot gas flow. The turbulence which exists at the backward-facing electrode moves the arc spot about the surface to prevent severe local damage. Chemical attack is inhibited by a laminated electrode surface of a low corrosive material and the turbulence which aids in cooling the electrode face. Additional cooling may be obtained by a purge jet at the electrode face.
REFERENCES:
patent: 2558816 (1951-07-01), Bruynes
patent: 3261993 (1966-07-01), Keating, Jr.
patent: 3406300 (1968-10-01), Teno et al.
patent: 3428835 (1969-02-01), Dzung
patent: 3660701 (1972-05-01), Blattmann et al.
patent: 3854061 (1974-12-01), Rosa
Curry Charles D. B.
Duggan Donovan F.
Gray Francis I.
Sciascia R. S.
The United States of America as represented by the Scretary of t
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