Rotary kinetic fluid motors or pumps – With passage in blade – vane – shaft or rotary distributor...
Patent
1990-09-10
1992-03-24
Look, Edward K.
Rotary kinetic fluid motors or pumps
With passage in blade, vane, shaft or rotary distributor...
415116, 415178, 60 3975, F01D 508
Patent
active
050982575
ABSTRACT:
An apparatus and method are provided for minimizing differential thermal expansion in external cooling air structures formed on the shrouds of the vane segments of a gas turbine. The external cooling air structure is formed from a laminate comprised of two layers joined in sandwich-like fashion. A passageway, which may be of a serpentine arrangement, is formed between the two layers of the laminate. Hot gas flowing over the shroud is directed through the passageway, thereby heating the structure so that its temperature is close to that of the shroud. Cooling air is bled into the hot gas directed to the passageway so as to reduce the temperature of the hot gas flowing through the passageway and prevent overheating of the external cooling air structure.
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A. J. Scalzo et al., "A New 150MW High Efficiency Heavy-Duty Combustion turbine", America Society of Mechanical Engineers paper, 88-GT-162, 1988.
Hultgren Kent G.
Matarazzo John C.
Look Edward K.
Verdier Christopher M.
Westinghouse Electric Corp.
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