METHOD FOR PROFILING A REPLACEMENT BLADE AS A REPLACEMENT PART FOR AN OLD BLADE FOR AN AXIAL TURBOMACHINE

摘要

The present invention relates to a method of imitating a replacement blade (1) for an axial flow turbomachine, said method comprising the steps of: - forming a hub contour geometry (5) and a housing contour geometry of the flow channel of the spherical blade (11) 11. A method of designing a blade airfoil (2) geometry of a replacement blade (1), comprising the steps of: measuring the axial position of the center of gravity of the blade airfoil (11) Defining a near clamping region (21) of the blade airfoil (2), wherein the positive influence of the back sweep (14) on the short side is classified as small; 1 of the replacement blade 1 disposed outside the region 21 until the axial position of the center of gravity of the blade airfoil 2 of the blade 1 coincides with the axial position of the spherical blade 11. [ Moving the foil section axially in the upstream direction Wherein the leading edge (7) in the region (21) from the clamping side section (5) of the replacement blade to the moved blade airfoil section (2) is tilted in the downstream direction toward the clamping side, (2) has a transition sweep (19) in the region (21).