Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2011-08-16
2011-08-16
Chaudhari, Chandra (Department: 2891)
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
07997868
ABSTRACT:
A turbine airfoil with a film cooling hole having a bell mouth shaped opening that has expansion in both the side walls and the downstream wall of from 15 to 25 degrees. The film cooling hole includes an expansion section formed with two long ribs and one short rib to form three inlets of equal cross sectional areas so that the flows into the three passages are the same. The short rib forms two middle passages to combine with two outer passages to form four exit passages for the film hole. The two side walls are curved outward in the stream-wise oriented film hole and have an expansion of from 0 to 5 degrees in the compound angled film hole.
REFERENCES:
patent: 4684323 (1987-08-01), Field
patent: 7300242 (2007-11-01), Liang
patent: 7374401 (2008-05-01), Lee
Chaudhari Chandra
Florida Turbine Technologies, Inc.
Ryznic John
LandOfFree
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