Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2011-03-08
2011-03-08
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
Reexamination Certificate
active
07901183
ABSTRACT:
A turbine blade with a low flow cooling circuit for the airfoil main body and the blade tip section which includes two 3-pass aft flowing serpentine flow cooling circuits. A first 3-pass serpentine circuit is located in the forward section with a first leg connected to a showerhead arrangement of film cooling holes. The third leg is connected to an upstream end of a blade tip cooling channel that extends toward the trailing edge and includes pin fins and a row of pressure side peripheral cooling holes to discharge cooling air. The second 3-pass circuit is located aft of the first 3-pass circuit and includes a third leg adjacent to the trailing edge region with a row of exit cooling holes connected to discharge cooling air from the serpentine. No film cooling holes are connected to the second and third legs of the two serpentine circuits so that low flow capability is achieved. A tip turn channel in the first serpentine provides blade tip cooling at a location upstream of the blade tip cooling channel.
REFERENCES:
patent: 5395212 (1995-03-01), Anzai et al.
Edgar Richard
Florida Turbine Technologies, Inc.
Ryznic John
LandOfFree
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