Blade device for a turbine and corresponding manufacturing method

摘要

The present invention relates to a blade device 300 for a turbine, in particular a steam turbine. The blade device 300 comprises a blade body 110. The blade body 110 comprises a radially inner end face 120 and a radially outer end face 130 which is formed opposed to the inner end face 120 with respect to a radial direction 140 of the turbine. The blade body 110 further comprises a channel 150 extending between the inner end face 120 and the outer end face 130. Furthermore the blade body 110 comprises a first groove 160 which connects the channel and an environment of the blade body 110 such that a fluid connection between the environment and the channel 150 is given. The first groove 160 has a first groove length 170 and a first groove width 180 which is smaller than the first groove length 170. Additionally, the first groove width 180 is smaller than 2 mm.