EXHAUST TURBINE, SUPERCHARGER, AND METHOD FOR CLEANING EXHAUST TURBINE

Provided is an exhaust turbine (100) that includes: an introduction pipe (10) forming a first introduction flow path (11) in which exhaust gas flows along an axis (X1); a casing portion (20) connected to the introduction pipe (10) and forming a first swirl flow path (21), having a spiral shape, through which the exhaust gas flows; a turbine portion (30) rotationally driven, by the exhaust gas guided from the first swirl flow path (21), about an axis (Z); and a nozzle portion (40) provided with a plurality of nozzle blades (41) along a circumferential direction about the axis (Z).The introduction pipe (10) includes a first feed portion (14a) so as to feed a solid cleanser including a solid matter having a predetermined particle size, to the first introduction flow path (11) along a first direction (Dr1) crossing an axial direction in which the axis (X1) extends, and the first direction (Dr1) is set so that the solid cleanser fed to the first introduction flow path (11) is guided to the nozzle portion (40) without contacting an inner wall of the casing portion (20).