English to French Tech/Engineering Patents (in a patent) BLADE DEVICE FOR A TURBINE AND CORRESPONDING MANUFACTURING METHOD

a blade device for a turbine, in particular a steam turbine, the blade device comprising a blade body comprising a radially inner end face and a radially outer end face which is formed opposed to the inner end face with respect to a radial direction of the turbine, wherein the blade body comprises a channel extending between the inner end face and the outer end face, wherein the blade body comprises a first groove which connects the channel and an environment of the blade body such that a fluid connection between the environment and the channel is given,wherein the groove has a first groove length and a first groove width which is smaller than the first groove length, and wherein the first groove width is smaller than 2 mm.