TURBINE ROTOR BLADE
1 Assignment
0 Petitions
Accused Products
Abstract
In a turbine rotor blade of a radial turbine, especially in a variable-geometry turbine with variable nozzles, an object is to restrict high-order resonance of the turbine rotor blade without increasing the size of a device with a simplified structure. A plurality of turbine rotor blades for a radial turbine is disposed on a hub surface. Each turbine rotor blade includes blade-thickness changing portions, at which at least a blade thickness of a cross-sectional shape at a middle portion of a blade height increases rapidly with respect to a blade thickness of a leading-edge side, at a predetermined position from a leading edge along a blade length which follows a gas flow from the leading edge to a trailing edge. The blade thickness increases to a blade thickness via the blade-thickness changing portions.
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Citations
15 Claims
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1-8. -8. (canceled)
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9. A turbine rotor blade for a radial turbine disposed inside a spirally-shaped scroll formed on a turbine casing into which an operation gas flows and configured to be driven to rotate by the operation gas flowing inwardly in a radial direction through the scroll, the turbine rotor blade comprising
a blade-thickness changing portion at which at least a blade thickness of a cross-sectional shape at a middle portion of a blade height increases rapidly with respect to a blade thickness of a leading-edge side, at a predetermined position from a leading edge along a blade length which follows a gas flow from the leading edge to a trailing edge, wherein a plurality of the turbine rotor blades is disposed on a hub surface, and wherein a node part of a secondary-mode resonance of the turbine rotor blade is positioned at the predetermined position.
Specification