Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1996-12-24
1998-09-29
Verdier, Christopher
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
416 92, 4151734, F01D 518
Patent
active
058138366
ABSTRACT:
A turbine blade including an airfoil section having a double-wall construction for side-wall impingement cooling on the pressure side and a multi-pass serpentine along the suction side of the blade, is described. More particularly, and in one embodiment, the airfoil section includes a pressure side wall and a suction side wall which are joined together at a leading edge and a trailing edge. The blade also includes a leading edge, or tip, and a trailing edge, or tail. The airfoil section also includes a leading edge cavity having a plurality of radial film air holes, and an inner cavity which is a three pass serpentine. As cooling air flows along the passageways, it convectively cools the portions of the turbine blade adjacent these passageways. The airfoil section further includes a trailing edge cavity to cool the trailing edge flow region of the airfoil section. A second, or double, wall is located between the pressure side wall and the inner cavity, and a plurality of impingement cavities are located between the second wall and the pressure side wall. Impingement holes provide communication between the passageways of the inner cavity and the impingement cavities. Multi-row, compound angle film holes extend from the impingement cavities so that cooling air from the impingement cavities can be discharged from the airfoil section. The double wall construction provides a more even distribution of the cooling film on pressure the side wall, which facilitates improved cooling of the airfoil section.
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patent: 5564902 (1996-10-01), Tomita
General Electric Company
Hess Andrew C.
Narciso David L.
Verdier Christopher
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