Shroud leakage flow discouragers

Patent · Tue Jan 01 04:00:00 EST 2002

OSTI ID:874247

Bailey, Jeremy Clyde ^[1]; Bunker, Ronald Scott ^[2]

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1. Middle Grove, NY
2. Niskayuna, NY

A turbine assembly includes a plurality of rotor blades comprising a root portion, an airfoil having a pressure sidewall and a suction sidewall, and a top portion having a cap. An outer shroud is concentrically disposed about said rotor blades, said shroud in combination with said tip portions defining a clearance gap. At least one circumferential shroud leakage discourager is disposed within the shroud. The leakage discourager(s) increase the flow resistance and thus reduce the flow of hot gas flow leakage for a given pressure differential across the clearance gap to improve overall turbine efficiency.

• Research Organization: General Electric Company (Schenectady, NY)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6350102
• OSTI ID: 874247
• Country of Publication: United States
• Language: English

Related Subjects

/415/
airfoil
assembly
blades
cap
circumferential
clearance
combination
comprising
concentrically
concentrically disposed
defining
differential
discourager
discouragers
disposed
efficiency
flow
gap
gas
gas flow
hot
hot gas
improve
increase
leakage
outer
overall
plurality
portion
portions
pressure
pressure differential
reduce
resistance
root
root portion
rotor
rotor blade
shroud
sidewall
suction
tip
top
turbine
turbine assembly