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Title: Shroud leakage flow discouragers

Abstract

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.

Inventors:
 [1];  [2]
  1. (Middle Grove, NY)
  2. (Niskayuna, NY)
Issue Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874247
Patent Number(s):
6350102
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
shroud; leakage; flow; discouragers; turbine; assembly; plurality; rotor; blades; comprising; root; portion; airfoil; pressure; sidewall; suction; top; cap; outer; concentrically; disposed; combination; tip; portions; defining; clearance; gap; circumferential; discourager; increase; resistance; reduce; hot; gas; differential; improve; overall; efficiency; gas flow; hot gas; pressure differential; concentrically disposed; turbine assembly; rotor blade; root portion; /415/

Citation Formats

Bailey, Jeremy Clyde, and Bunker, Ronald Scott. Shroud leakage flow discouragers. United States: N. p., 2002. Web.
Bailey, Jeremy Clyde, & Bunker, Ronald Scott. Shroud leakage flow discouragers. United States.
Bailey, Jeremy Clyde, and Bunker, Ronald Scott. Tue . "Shroud leakage flow discouragers". United States. https://www.osti.gov/servlets/purl/874247.
@article{osti_874247,
title = {Shroud leakage flow discouragers},
author = {Bailey, Jeremy Clyde and Bunker, Ronald Scott},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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