Blade, useful in turboshaft engine, comprises blade body, blade head, pressure and suction side walls, where pressure side wall has concave curvature at head and suction side wall is straight at the hollow portion

摘要

The blade (1) comprises a blade body (6), a blade head (2), a pressure side wall (4), and a suction side wall (5), where the pressure side wall has a concave curvature at the blade head. The suction side wall is not curved in the direction of reference axis at the head. The blade head comprises a hollow portion. A curvature of the pressure side wall is formed in the hollow portion. The suction side wall is straight at the hollow portion. A transverse wall forms a bottom of the hollow portion, and is pierced by holes and dedusting holes. The blade body has a hollow cavity. The blade (1) comprises a blade body (6), a blade head (2), a pressure side wall (4), and a suction side wall (5), where the pressure side wall has a concave curvature at the blade head. The suction side wall is not curved in the direction of reference axis at the head. The blade head comprises a hollow portion. A curvature of the pressure side wall is formed in the hollow portion. The suction side wall is straight at the hollow portion. A transverse wall forms a bottom of the hollow portion, and is pierced by holes and dedusting holes. The blade body has a hollow cavity defined by the transverse wall and a part of the side walls. The side walls have constant thickness when moving along the reference axis of the blade. Independent claims are included for: (1) a core for producing a blade; and (2) a method for manufacturing a blade.