Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2009-03-13
2011-11-22
Lebentritt, Michael (Department: 2829)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S09600A, C416S09600A, C416S09700R, C416S228000, C415S115000, C415S116000
Reexamination Certificate
active
08061990
ABSTRACT:
A turbine rotor blade with a series of 3-pass serpentine flow near wall cooling circuits that extend along the airfoil to provide low flow cooling for the blade. the 3-pass serpentine circuits include a first channel positioned along the pressure side wall to provide near wall cooling, a third channel positioned along the suction side wall to provide near wall cooling, and a second or middle channel located between the two near wall channels in the cooler section of the airfoil. The two near wall radial extending cooling channels flow in a direction toward the blade tip so that the centrifugal force developed due to blade rotation will aid in driving the flow while the second channel is without trip strips and has a larger flow area to minimize flow loss. The first channel with cooler air provides near wall cooling to the hotter sections of the airfoil while the third channel uses the heated air to provide cooling to the cooler sections of the airfoil.
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Florida Turbine Technologies, Inc.
Lebentritt Michael
Ryznic John
LandOfFree
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