Francis turbine

Details Francis turbine Francis turbine

2007-03-27

2007-03-27

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

C416S22300B, C416S243000

Reexamination Certificate

active

10528142

ABSTRACT:
A Francis runner and a hydraulic turbine equipped with such a runner, wherein the runner includes a ceiling, a belt, and blades which extend between the ceiling and the belt and which define liquid flow channels therebetween. A ratio (e/L) of a maximum thickness Ce) of each blade to an average developed length (L) of an average fibre of each blade is between 0.1 and 0.2. At a leading edge of each blade, the average fibre is oriented, over essentially an entire height of the leading edge, along a straight line (Δ23), which forms an angle (α) greater than 90° relative to a line (U) defining a direction of rotation of the leading edge of the runner.

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