Hollow rotor blade for the turbine of a gas turbine engine, the blade being fitted with a “bathtub”

A hollow rotor blade for the turbine of a gas turbine engine, the blade including a pressure side wall and a suction side wall that meet each other at a leading edge and at a trailing edge, said leading and trailing edges extending between a blade root and a free end, said blade further including an internal cooling passage, an open cavity situated at the free end of the blade and defined by an end wall extending over the entire free end of the blade and by a rim extending between the leading edge and the trailing edge along at least the suction side wall, and cooling channels connecting said internal cooling passage and the free end beside the pressure side wall, said cooling channels being inclined relative to the pressure side wall, the pressure side wall presenting a projecting end portion whose outside face is inclined relative to the outside face of the pressure side wall, the end wall being connected to the pressure side wall at said end portion, and said cooling channels being disposed in said end portion, being parallel to the outside face of said end portion so that they open out into the tip of said end portion towards the free end of the blade, wherein at least a portion of the tip of the end portion lies in the same plane as the outside face of the end wall, such that at least some of said cooling channels open out into the edge of the open cavity beside the pressure side wall, and wherein at least a first portion of the inside face of said rim of the suction side wall is inclined, enlarging said rim radially towards the free end of the blade.