Optimized aerodynamic airfoil for a turbine blade

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Concave surface

Reexamination Certificate

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C415S191000, C416S22300B, C416SDIG004

Reexamination Certificate

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08038410

ABSTRACT:
When cold and in the uncoated state, the aerodynamic airfoil is substantially identical to a nominal airfoil determined by the Cartesian coordinates X, Y, Z′ given in Table 1, in which the coordinate Z′ is the ratio D/H where D is the distance from the point in question to a reference plane P0, located at the base of the nominal airfoil, and H is the height of this airfoil, measured from said reference plane up to the tip of the blade. The D and H measurements being taken radially with respect to the axis of the turbine whereas the X coordinate is measured in the axial direction of the turbine.

REFERENCES:
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patent: 6736599 (2004-05-01), Jacks et al.
patent: 6739838 (2004-05-01), Bielek et al.
patent: 7094034 (2006-08-01), Fukuda et al.
patent: 7367779 (2008-05-01), Girgis et al.
patent: 7467920 (2008-12-01), Sullivan et al.
patent: 2007/0248465 (2007-10-01), Botrel et al.
patent: 1 621 729 (2006-02-01), None

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