Extruded profile and method for producing a blade of a Nachleitrads, blade of a Nachleitrads, Nachleitrad and turbomachinery with such a Nachleitrad

摘要

Extruded profile (26) for producing a blade (20) of a Nachleitrads (18) of a turbomachine, the extruded profile (26) has a cross-sectional area with an axial length LAX and a relative to the axial length LAX relative thickness D / LAX, wherein the cross-sectional area along its axial length LAX has the following adjoining regions: an at least approximately axisymmetric leading edge region (28); A first transition region (30) having a relative thickness D / LAX varying along the first transition region (30); A first constant region (32) having a relative thickness D / LAX which is at least substantially constant along the first constant region (32) and which starts at 10% LAX at the earliest with respect to a front edge (22) of the extruded profile (26) and at the latest at 50% LAX ends; - A second transition region (34) having a along the second transition region (34) varying relative thickness D / LAX, based on the leading edge (22) of the extruded profile (26) starts at 30% LAX and ends no later than 90% LAX; A second constant region (36) having a relative thickness D / LAX at least substantially constant along the second constant region (36) and an axial length X of at most 40% LAX; and - an at least approximately axisymmetric trailing edge region (38).