Electric heating – Heating devices – Combined with diverse-type art device
Patent
1974-03-14
1976-12-14
Bartis, A.
Electric heating
Heating devices
Combined with diverse-type art device
219372, 219522, 244134D, 415121R, 416 95, 416229A, H05B 100, F01D 508, F04D 2958
Patent
active
039977587
ABSTRACT:
An axial flow elastic fluid turbine apparatus includes a rotor having an annular array of circumferentially spaced blades. A casing encircles the rotor and an annular array of circumferentially spaced stationary nozzle blades is fastened the casing and arranged to direct the elastic fluid against the blades of the rotor. An outer covering is disposed over the radially outermost half of at least one blade of the stationary array and a thermal insulating member is disposed between the surface of the blade and the outer covering. Electric heating means are provided for raising the temperature of the outer covering to the Leidenfrost point, i.e., the point at which the temperature of the covering exceeds the vaporization temperature of the elastic fluid corresponding to the prevailing ambient pressure by more than 200.degree. C., to evaporate water droplets which collect on the stationary blade and to prevent the accumulation of relatively smaller water droplets on the stationary blade. By preventing the accumulation of water droplets on the stationary blades, erosion of the rotor blades is avoided.
REFERENCES:
patent: 2004777 (1935-06-01), Bassler
patent: 2304259 (1942-12-01), Karrer
patent: 2377611 (1945-06-01), Caldwell
patent: 2540472 (1951-02-01), Boyd
patent: 2547934 (1951-04-01), Gill
patent: 2690890 (1954-10-01), Weeks et al.
Bartis A.
Telfer G. H.
Westinghouse Electric Corporation
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