Abstract: A turbocharger includes a plurality of blades (7; 7?) which are arranged in a turbine casing (2). Each blade has the following: a profile underside (8; 8?) and a profile top side (9; 9?) which determine the blade thickness, a blade leading edge (10; 10?) at a first intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a blade trailing edge (11; 11?) at a second intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a profile center line (12; 12?) which is defined by the blade underside (8; 8?) and the blade top side (9; 9?) and runs between them from the blade leading edge (10; 11?) to the blade trailing edge (11; 11?), and in which the profile center line (12; 12?) runs in a wave-like manner.

Abstract: The invention relates to a turbocharger comprising a turbine casing (2) which has an exhaust-gas inlet opening (3) and an exhaust-gas outlet opening (4); comprising a turbine wheel (5) which is fastened to a shaft (6) and is arranged in the turbine casing (2); comprising a plurality of blades (7; T) which are arranged in the turbine casing (2) between the exhaust-gas inlet opening (3) and the turbine wheel (5), wherein each blade has the following: a profile underside (8; 8?) and a profile top side (9; 9?) which determine the blade thickness, a blade leading edge (10; 10?) at a first intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a blade trailing edge (11; 11?) at a second intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a profile centre line (12; 12?) which is defined by the blade underside (8; 8?) and the blade top side (9; 9?) and runs between them from the blade leading edge (10; 11?) to the blade trailing edge (11; 11?), wherein the profile centre l