Turbine wheel for a turbine engine
A turbine wheel for a turbine engine comprising a disc carrying blades. Each blade comprises an upstream radial wall and a downstream radial wall which extend inwards from the platform of the blade. Inter-blade cavities each accommodate one inter-blade sealing and vibration damping member. According to the invention, each inter-blade sealing and vibration damping member comprises at least a first transverse partition wall axially arranged at a distance from a downstream (or upstream, respectively) portion of the member and axially opposite two upstream (or downstream, respectively) so as to obstruct a flow of incoming air into the cavity between two adjacent upstream radial walls or two adjacent downstream radial walls.
1. A turbine wheel for a turbine engine, comprising:
a disk carrying blades, each blade comprising:
a platform, wherein the platform carries an impeller and the platform is connected by a stilt to a root;
an upstream radial wall; and
a downstream radial wall;
wherein the upstream radial wall and the downstream radial wall extend inwards from the platform, with the root of each blade being engaged into notches on a periphery of the disk, so that the upstream radial wall, the downstream radial wall, and the platform are circumferentially arranged end-to-end, and define an inter-blade cavity radially inside each platform, each inter-blade cavity accommodating an inter-blade sealing and vibration damping member comprising:
a bottom wall applying onto inner faces of two adjacent platforms and extending inwards on its periphery by a flanged edge, the flanged edge having a downstream portion applying onto a downstream radial wall and an upstream portion applying onto an upstream radial wall; and at least a first transverse partition wall arranged axially at a distance from said downstream portion of the inter-blade sealing and vibration damping member and from said upstream portion of the inter-blade sealing and vibration damping member so as to obstruct a flowing of incoming air into the inter-blade cavity between two adjacent upstream radial walls or two adjacent downstream radial walls, wherein the flanged edge has a first side flank and a second side flank, each axially extending along faces of two adjacent stilts, with said first transverse partition wall extending from the first side flank to the second side flank.
2. The turbine wheel according to claim 1 , wherein the inner faces of the adjacent platforms define a truncated surface with a section perpendicular to an axis of the turbine wheel, the truncated surface tapering downstream, or upstream, respectively.
3. The turbine wheel according to claim 1 , wherein said first transverse partition wall of each member radially extends inwards relative to the flanged edge.
4. The turbine wheel according to claim 1 , wherein said first transverse partition wall is axially arranged substantially in a middle of the adjacent platforms.
5. The turbine wheel according to claim 1 , wherein each inter-blade sealing and vibration damping member comprises at least one opening for a passage of air in at least one of the upstream portion of the inter-blade sealing and vibration damping member and the downstream portion of the inter-blade sealing and vibration damping member.
6. The turbine wheel according to claim 5 , wherein at least one of the upstream portion of the inter-blade sealing and vibration damping member and the downstream portion of the inter-blade sealing and vibration damping member comprises two notches opening inwards, arranged on each side of a lug.
7. The turbine wheel according to claim 1 , wherein at least one inter-blade sealing and vibration damping member further comprises a second transverse partition wall axially arranged between the first transverse partition wall and one of the upstream radial wall and the downstream radial wall.
8. A turbine engine comprising a turbine having at least one turbine wheel according to claim 1 .
9. The inter-blade sealing and vibration damping member for a turbine wheel according to claim 1 , comprising a bottom wall extending inwards on its periphery by a flanged edge, the flanged edge comprising a first side flank and a second side flank between which a first transverse partition wall extends.