Turbine blade with serpentine flow cooling

Details Turbine blade with serpentine flow cooling Turbine blade with serpentine flow cooling

2009-04-04

2011-12-20

Sarkar, Asok (Department: 2891)

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

Changing state mass within or fluid flow through working...

C415S115000, C416S092000, C416S09600A

Reexamination Certificate

active

08079814

ABSTRACT:
A turbine rotor blade with an airfoil cooling circuit and a platform cooling circuit formed integral with each other such that only one cooling flow is used. The airfoil cooling circuit includes a 5-pass aft flowing serpentine circuit with a first leg located adjacent to the leading edge region. The platform includes a mid section platform cooling circuit and an aft section platform cooling circuit. Cooling air from the second leg flows into the mid section platform cooling circuit and then into the third leg, turns at the blade tip and flows from the fourth leg into the aft section platform cooling circuit, and then into the fifth leg and up toward the blade tip. Cooling air from the fifth leg is bled off through rows of multiple impingement holes in the trailing edge and then discharged through exit holes or slots formed along the trailing edge.

REFERENCES:
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patent: 6079946 (2000-06-01), Suenaga et al.
patent: 6132173 (2000-10-01), Tomita et al.
patent: 6402471 (2002-06-01), Demers et al.
patent: 2002/0098078 (2002-07-01), Beeck et al.
patent: 2006/0056970 (2006-03-01), Jacala et al.
patent: 2007/0177976 (2007-08-01), Cunha et al.
patent: 2007/0201979 (2007-08-01), Veltre et al.
patent: 2008/0019841 (2008-01-01), Cunha

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