Rotatable component for turbomachines, including a non-axisymmetric overhanging portion

A turbomachine comprising:

• a stationary component comprising an inlet recess portion and abradable seal portions;
• and
• a rotatable component disposed within the stationary component, wherein the rotatable component comprises an airfoil comprising a pressure side and a suction side, and a mechanical component coupled to the airfoil, wherein the mechanical component comprises:
• a forward overhanging portion disposed at a leading edge of the airfoil, extending longitudinally beyond the leading edge, and proximate to the inlet recess portion;
• and
• an aft overhanging portion disposed at a trailing edge of the airfoil and extending longitudinally beyond the trailing edge, wherein both the forward overhanging portion and the aft overhanging portion further extend circumferentially along the pressure side and the suction side of the airfoil, and wherein the aft overhanging portion comprises a non-axisymmetric profile for regulating ingress of a fluid along a circumferential direction from the pressure side to the suction side, at the trailing edge.

A method comprising:

• directing a fluid along a stationary component and a rotatable component of a turbomachine,
• wherein the rotatable component is disposed within the stationary component, wherein the rotatable component comprises an airfoil comprising a pressure side and a suction side, and a mechanical component coupled to the airfoil;
• wherein the mechanical component comprises:
• a forward overhanging portion disposed at a leading edge of the airfoil and extending longitudinally beyond the leading edge;
• and
• an aft overhanging portion disposed at a trailing edge of the airfoil and extending longitudinally beyond the trailing edge, wherein both the forward overhanging portion and the aft overhanging portion further extend circumferentially along the pressure side and the suction side of the airfoil;
• rotating the rotatable component along a circumferential direction of the rotatable component;
• and
• regulating an ingress of the fluid at the trailing edge along the circumferential direction from the pressure side to the suction side via the aft overhanging portion comprising a non-axisymmetric profile.