Turbine BOAS with edge cooling

Details Turbine BOAS with edge cooling Turbine BOAS with edge cooling

2007-10-19

2011-11-22

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

Reexamination Certificate

active

08061979

ABSTRACT:
A cooling hole having an inlet passage forming an inward spiral flow path and an outlet passage forming an outward spiral flow path in which the two paths are counter flowing in order to improve the heat transfer coefficient. The spiral cooling hole is used in a blade outer air seal (BOAS) for a turbine in which the edges of the shroud segments include a counter flowing micro serpentine flow cooling circuit with thin diffusion discharge cooling slots for the BOAS edges. The total BOAS cooling air is impingement from the BOAS cooling air manifold and metered through the impingement cooling holes to produce impingement cooling onto the backside of the BOAS. The spent cooling air is then channels into the multiple micro serpentine cooling flow circuits located around the four edges of the shroud segments. This cooling air then flows in a serpentine path through the horizontal serpentine flow channels and then discharged through the thin diffusion cooling slots as peripheral purge air for the mate faces as well as the spacing around the BOAS or shroud segments. Trip strips are used in the serpentine flow channels for the augmentation of internal heat transfer cooling capability. The micro serpentine flow cooling air circuits spaced around the four edges of the shroud segments are formed into the shroud segments during the casting process of the shroud segments.

REFERENCES:
patent: 5375973 (1994-12-01), Sloop et al.
patent: 5486090 (1996-01-01), Thompson et al.
patent: 5538393 (1996-07-01), Thompson et al.
patent: 5584651 (1996-12-01), Pietraszkiewicz et al.
patent: 6354795 (2002-03-01), White et al.
patent: 6508623 (2003-01-01), Shiozaki et al.
patent: 6602048 (2003-08-01), Fujikawa et al.
patent: 6659716 (2003-12-01), Laurello et al.
patent: 6676370 (2004-01-01), Tiemann
patent: 6899518 (2005-05-01), Lucas et al.
patent: 6905302 (2005-06-01), Lee et al.
patent: 7137776 (2006-11-01), Draper et al.
patent: 7246992 (2007-07-01), Lee
patent: 7246993 (2007-07-01), Bolms et al.
patent: 7306424 (2007-12-01), Romanov et al.
patent: 7517189 (2009-04-01), Camus
patent: 7621719 (2009-11-01), Lutjen et al.

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