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A turbine disc for a bladed rotor assembly includes a rim, a plurality of generally axially extending slots in the rim adapted to receive the roots of rotor blades, the radially innermost surfaces of all of said slots lying at a first radius, a continuous circumferential flange projecting axially fr

A turbine disc for a bladed rotor assembly includes a rim, a plurality of generally axially extending slots in the rim adapted to receive the roots of rotor blades, the radially innermost surfaces of all of said slots lying at a first radius, a continuous circumferential flange projecting axially from the rim of the disc on at least one side face thereof, said flange providing a continuous circumferentially extending surface at a radius less than said first radius and being connected to the disc at a radius greater than said first radius, and a continuous circumferentially extending cooling air channel open towards the radially inner side of the flange, and extending radially outwardly between the flange and the side face of the disc to an extent sufficient to intersect the bottom and a portion of at least one of the flanks of each of the blade root-receiving slots.

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A turbine disc for a bladed rotor assembly comprising a rim, a plurality of generally axially extending slots in the rim adapted to receive the roots of rotor blades, the radially innermost surfaces of all of said slots lying at a first radius, a continuous circumferential flange integral with and p

A turbine disc for a bladed rotor assembly comprising a rim, a plurality of generally axially extending slots in the rim adapted to receive the roots of rotor blades, the radially innermost surfaces of all of said slots lying at a first radius, a continuous circumferential flange integral with and projecting axially from the rim of the disc on at least one side face thereof, said flange defining a continuous circumferentially extending surface at a radius less than said first radius and being integrally connected to the disc at a radius greater than said first radius, and a continuous circumferentially extending cooling air channel open towards the radially inner side of the flange, and extending radially outwardly between the flange and the side face of the disc and intersecting and opening into and through the radially innermost surface and a portion of at least one of the flanks of each of the blade root-receiving slots whereby air entering said cooling air channel issues into said blade receiving slots below a corresponding blade root.