Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2009-05-15
2011-12-27
Nguyen, Ha Tran T (Department: 2829)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S095000, C416S09600A, C415S115000
Reexamination Certificate
active
08083486
ABSTRACT:
A turbine rotor blade with a 3-pass serpentine flow cooling channel having a first leg located at the leading edge of the airfoil and a third leg located adjacent to the trailing edge of the airfoil and connected to a row of exit slots, and in which a second leg includes three separate channels in parallel with inlet metering holes to regulate a cooling air flow and pressure in each separate channel. The blade includes a blade tip channel connected to the first leg of the serpentine and which supplies the cooling air to the second leg channels through the separate metering holes. Because the metering holes can be sized individually, the hottest part of the mid-chord region of the airfoil can be supplied with more cooling air flow and the pressure ratio across the trailing edge can be reduced so that the exit slots can be larger or more numerous.
REFERENCES:
patent: 2005/0084370 (2005-04-01), Gross
patent: 2005/0265836 (2005-12-01), Mongillo et al.
Dehne Aaron
Florida Turbine Technologies, Inc.
Nguyen Ha Tran T
Ryznic John
LandOfFree
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