A generator rotor, the rotor comprising a rotor body and a plurality of conductive windings extending along an axial extent of the rotor body and being embedded in axially extending slots provided in the rotor body, the conductive windings further comprising winding end sections (211, 212) adjacent axial ends of the conductive windings, wherein the winding end sections (211, 212) are bent to comprise axially extending winding end sections and adjacent circumferentially extending winding end sections, wherein further at least on axial blocking member is provided between two neighboring circumferentially extending winding end sections and at least one tangential blocking member is provided between two neighboring axially extending winding end sections, wherein the axial blocking member comprises a circumferentially and radially extending wall and the tangential blocking member comprises an axially and radially extending wall, an outer axial edge facing a circumferentially extending winding end section and an inner axial edge facing an axial center of the rotor, wherein a seal (313, 323) is provided between a surface of the circumferentially and radially extending wall and the adjacent circumferentially extending winding end section, and between a surface of the axially and radially extending wall and the adjacent axially extending winding end sections, wherein discharge channels (13, 14) are provided in ridges of the rotor body between the slots, wherein axially extending discharge channels are in fluid communication with radially extending discharge channels which are open at a radially outer surface of the rotor body and wherein the axially extending discharge channels comprise openings facing an edge of a tangential blocking member, wherein a flow channel is provided between each surface of the wall (311, 321) of the blocking members (31, 32) and the adjacent winding end section (211, 212), and the seal (313, 323) is arranged at a radially inner end of the flow channel, wherein flow guidance structures (312, 322) are provided protruding from the surface of the wall (311, 321) of the blocking members (31, 32) and extending into the flow channel, wherein a terminal structure of the tangential blocking member prevents the coolant from being directly discharged through openings and discharge channels (13, 14) by forcing the coolant onto a meandering trajectory going first radially inward and thereafter radially outward before entering discharge channels (13, 14), characterized in that oblong guidance structures of the tangential blocking member guide the coolant flow in an axial direction while spreading it over the surface of the winding end section, and that a flow deflection structure is arranged in an axial direction between the oblong guidance structures and the terminal structure, wherein the flow deflection structure serves to deflect an axial flow directed from the outer axial edge towards the inner axial edge of the tangential blocking member into a radially inwardly direction. wherein the axial blocking member comprises a circumferentially and radially extending wall and the tangential blocking member comprises an axially and radially extending wall, an outer axial edge facing a circumferentially extending winding end section and an inner axial edge facing an axial center of the rotor, wherein a seal (313, 323) is provided between a surface of the circumferentially and radially extending wall and the adjacent circumferentially extending winding end section, and between a surface of the axially and radially extending wall and the adjacent axially extending winding end sections, wherein discharge channels (13, 14) are provided in ridges of the rotor body between the slots, wherein axially extending discharge channels are in fluid communication with radially extending discharge channels which are open at a radially outer surface of the rotor body and wherein the axially extending discharge channels comprise openings facing an edge of a tangential blocking member, wherein a flow channel is provided between each surface of the wall (311, 321) of the blocking members (31, 32) and the adjacent winding end section (211, 212), and the seal (313, 323) is arranged at a radially inner end of the flow channel, wherein flow guidance structures (312, 322) are provided protruding from the surface of the wall (311, 321) of the blocking members (31, 32) and extending into the flow channel, wherein a terminal structure of the tangential blocking member prevents the coolant from being directly discharged through openings and discharge channels (13, 14) by forcing the coolant onto a meandering trajectory going first radially inward and thereafter radially outward before entering discharge channels (13, 14), characterized in that oblong guidance structures of the tangential blocking member guide the coolant flow in an axial direction while spreading it over the surface of the winding end section, and that a flow deflection structure is arranged in an axial direction between the oblong guidance structures and the terminal structure, wherein the flow deflection structure serves to deflect an axial flow directed from the outer axial edge towards the inner axial edge of the tangential blocking member into a radially inwardly direction.