Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1990-09-12
1993-08-03
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
415115, F01D 518
Patent
active
052323439
ABSTRACT:
An exemplary preferred embodiment of the present invention includes a gas turbine blade having an internal coolant passage therein of width D and a plurality of longitudinally spaced substantially straight turbulator ribs having a height E disposed substantially perpendicularly to a longitudinal axis of the coolant passage. The ratio E/D is preferably within the range of about 0.07 and about 0.33 and the height E of the ribs being in the range of about 0.010 inches and about 0.025 inches. These features may be utilized in a relatively small blade, e.g., 1.0 inch, for obtaining enhanced cooling ability for operation in turbine gas temperatures greater than about 2,300 degrees F. without the need for conventional, relatively complex cooling structures required for larger blades.
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Advanced Concepts in Small Helicopter Engine Air-Cooled Turbine Design by L. A. Bevilacqua and W. E. Lightfoot; dated Sep. 13-15, 1983; a 12-page technical paper.
General Electric Company
Herkamp Nathan D.
Kwon John T.
Squillaro Jerome C.
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