초록 ▼

A turbocharger (5) comprising a housing (10) including a compressor shroud (14) and a turbine shroud (12). The turbocharger (5) also includes a compressor wheel (18) and a turbine wheel (116, 216, 316, 416). The compressor wheel (18) includes a compressor hub (44) and a plurality of circumferentiall

A turbocharger (5) comprising a housing (10) including a compressor shroud (14) and a turbine shroud (12). The turbocharger (5) also includes a compressor wheel (18) and a turbine wheel (116, 216, 316, 416). The compressor wheel (18) includes a compressor hub (44) and a plurality of circumferentially spaced compressor blades (45, 46) extending radially from the compressor hub (44). The turbine wheel (116, 216, 316, 416) includes a turbine hub (124, 224, 324, 424) and a plurality of circumferentially spaced blades (126, 226, 326, 426) extending radially from the turbine hub (124, 224, 324, 424) with a hub surface (125, 225, 325, 425) extending between adjacent blades (126, 226, 326, 426). The turbine wheel (116, 216, 316, 416) also includes at least one surface discontinuity (135, 235, 335, 435) on the turbine hub surface (125, 225, 325, 425).

대표청구항 ▼

1. A turbocharger (5), comprising: a housing (10) including a compressor shroud (14) and a turbine shroud (12);a compressor wheel (18), including: a compressor hub (44); anda plurality of circumferentially spaced compressor blades (45, 46) extending radially from the compressor hub (44); anda turbin

1. A turbocharger (5), comprising: a housing (10) including a compressor shroud (14) and a turbine shroud (12);a compressor wheel (18), including: a compressor hub (44); anda plurality of circumferentially spaced compressor blades (45, 46) extending radially from the compressor hub (44); anda turbine wheel (216), including: a turbine hub (224);a plurality of circumferentially spaced blades (226) extending radially from the turbine hub (224) with a hub surface (225) extending between adjacent blades (226); andat least one protruding surface discontinuity (235) on the turbine hub surface (225) and separated from the blades. 2. The turbocharger (5) according to claim 1, wherein the surface discontinuity (235) is in the form of a plurality of protuberances. 3. A turbocharger turbine wheel (116), comprising: a turbine hub (124), wherein the hub (124) includes at least one circumferentially extending surface discontinuity (135) extending around an entire circumference of the hub and operative to energize a boundary layer of a fluid flow (F) associated with the hub (124); anda plurality of circumferentially spaced blades (126) extending radially from the hub (124). 4. The turbocharger turbine wheel (116) according to claim 3, including a plurality of circumferentially extending surface discontinuities (135). 5. The turbocharger turbine wheel (116) according to claim 3, wherein the circumferentially extending surface discontinuity (135) is in the form of a rib (135). 6. The turbocharger turbine wheel (116) according to claim 5, including a plurality of circumferentially extending ribs (135). 7. A turbocharger turbine wheel (216), comprising: a turbine hub (224);a plurality of circumferentially spaced blades (226) extending radially from the turbine hub (224) with a hub surface (225) extending between adjacent blades (226); andat least one protruding surface discontinuity (235) on the turbine hub surface (225) and separate from the blades. 8. The turbocharger turbine wheel (216) according to claim 7, wherein the surface discontinuity (235) is in the form of a protuberance (235).