High efficiency rotor for the first phase of a gas turbine
First Claim
1. A rotor for the first phase of a low-pressure turbine having a series of blades each defined by coordinates of a discreet combination of points, in a Cartesian reference system (X,Y,Z), wherein the axis (Z) is a radial axis intersecting the central axis of the turbine, the profile of each blade being identified by means of a series of closed intersection curves between the profile itself and planes (X,Y) lying at distances (Z) from the central axis, each blade having an average throat angle defined by the cosine arc of the ratio between the average throat length at mid-height of the blade and the circumferential pitch evaluated at the radius of the average throat point, characterized in that the average throat angle ranges from 54.9°
- to 57.9°
.
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Accused Products
Abstract
Rotor for the first phase of a low-pressure turbine having a series of blades (1) each defined by coordinates of a discreet combination of points, in a Cartesian reference system (X,Y,Z), wherein the axis (Z) is a radial axis intersecting the central axis of the turbine.
The profile of each blade (1) is identified by means of a series of closed intersection curves (20) between the profile itself and planes (X,Y) lying at distances (Z) from the central axis.
Each blade (1) has an average throat angle defined by the cosine arc of the ratio between the average throat length at mid-height of the blade and the circumferential pitch evaluated at the radius of the average throat point; the average throat angle ranges from 54.9° to 57.9°.
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Citations
7 Claims
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1. A rotor for the first phase of a low-pressure turbine having a series of blades each defined by coordinates of a discreet combination of points, in a Cartesian reference system (X,Y,Z), wherein the axis (Z) is a radial axis intersecting the central axis of the turbine, the profile of each blade being identified by means of a series of closed intersection curves between the profile itself and planes (X,Y) lying at distances (Z) from the central axis, each blade having an average throat angle defined by the cosine arc of the ratio between the average throat length at mid-height of the blade and the circumferential pitch evaluated at the radius of the average throat point, characterized in that the average throat angle ranges from 54.9°
- to 57.9°
. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- to 57.9°
Specification