Axial flow compressor
AssigneeResearch Institute of Advanced Material Gas-Generator, Ltd.
InventorsIkuhisa Mizuta, Kaoru Chiba
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Abstract
An axial flow compressor is disclosed. The axial flow compressor has a casing defining a compression passage therein. The casing has an inner surface and a center axis extending along the elongated direction of the casing. A plurality of rotor blades fixed to a disk rotate in the compression passage around the center axis. Each of the rotor blades has a tip, and the tip defines a rotation area having a width extending in the direction along the center axis. A circular concavity is formed on the inner surface of the casing extending completely around the inner surface. The circular concavity has a continuous curved shape in a sectional view, and the circular concavity is formed at a portion corresponding to a front part of the rotation area of the rotor blades.
Claims11
An axial flow compressor, said axial flow compressor comprising:
- a casing defining a compression passage therein, said casing having an inner surface and a center axis extending along the elongated direction of said casing;
- a plurality of rotor blades rotating in said compression passage around said center axis, each of said rotor blades having a tip and a span, said tips defining a rotation area having a width extending in the direction along said center axis;
- and
- a circular concavity formed on said inner surface of said casing extending completely around said inner surface, said circular concavity having a continuous curved shape in a sectional view, said circular concavity being formed at a portion corresponding to a front part of said rotation area of said rotor blades, the depth of said circular concavity being 0.2-2.5% of said span of said blade, and the deepest portion of said circular concavity being located corresponding to the portion in which a shock wave will occur in said casing.
Dependencies are inferred from the claim text.