General Electric   DS6800CCID1D1D  !!!  ---mail to: sales3@amikon.cn  

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Seals in the turbine shell prevent leakage of combustion gases around the nozzle from the inlet to the exhaust. Compressor discharge air is fed to these sealing rings through orifices in the shell. A key feature of the first-stage nozzle is the air-cooled partition which increases nozzle life substantially. Cooling air from the compressor discharge is directed through the body of the individual nozzle partitions, exiting through holes near the trailing edge. 

This not only cools the metal, but blankets the trailing edge with a film of air. Additionally, relatively thick nozzle partition trailing edges provide increased strength and oxidation resistance, again providing longer nozzle life. 

General Electric   DS6800CCID1D1D

GE  DS6800CCID1D1D  | General Electric | BOARD MODULE

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The long shank bucket design lowers the turbine wheel rim a substantial distance below the hot gas path. The high thermal resistance of the shank results in a considerable temperature drop between the hot bucket vane and the wheel dovetail slot

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