초록

Exemplary methods, devices and/or system for reducing noise produced by a turbine, such as, a turbocharger turbine. An exemplary exhaust conduit employs material to absorb exhaust-borne noise and/or structure-borne noise. Another exemplary exhaust conduit employs features that dampen wall vibration.

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What is claimed is: 1. A turbine housing for housing a turbine wheel, the turbine housing comprising: cylindrical wall having an cylindrical wall axis for coaxial alignment with a rotational axis of a turbine wheel; an integral exhaust outlet conduit that damps structural vibrations and absorbs aco

What is claimed is: 1. A turbine housing for housing a turbine wheel, the turbine housing comprising: cylindrical wall having an cylindrical wall axis for coaxial alignment with a rotational axis of a turbine wheel; an integral exhaust outlet conduit that damps structural vibrations and absorbs acoustic energy wherein the integral exhaust outlet conduit comprises a proximal end having an axis coaxial to the cylindrical wall axis, wherein the integral exhaust outlet conduit holds an inner conduit layer disposed between a rigid metal outer conduit layer and an innermost conduit layer and wherein the inner conduit layer comprises at least one member selected from a group consisting of woven wire, glass, metal foam, ceramic foam, ceramic particles, and metal particles. 2. The turbine housing of claim 1, wherein the innermost conduit layer comprises perforated metal. 3. The turbine housing of claim 1 housing a turbine wheel and wherein the integral exhaust outlet conduit proximal end is positioned proximate to the turbine wheel. 4. The turbine housing of claim 3, wherein the inner conduit layer has a proximal end positioned proximate to the turbine wheel. 5. The turbine housing of claim 1, wherein the inner conduit layer is positionable within the integral exhaust outlet conduit. 6. An exhaust conduit to receive exhaust from a turbine, to receive structural vibrations from a housing of the turbine, to damp the structural vibrations and to absorb acoustic energy carried by the exhaust, the exhaust conduit comprising: an inner conduit layer comprising at least one member selected from a group consisting of woven wire, glass, metal foam, ceramic foam, ceramic particles, and metal particles; and a rigid outer conduit layer for housing the inner conduit layer and connecting the exhaust conduit to a turbine wherein the rigid outer conduit layer has a proximal end having an axis for coaxial alignment with a rotational axis of a turbine wheel of the turbine. 7. The exhaust conduit of claim 6, wherein the exhaust conduit connects directly to the turbine. 8. The exhaust conduit of claim 6, wherein the turbine comprises a turbine housing and a turbine wheel and the exhaust conduit connects directly to the turbine housing. 9. The exhaust conduit of claim 6, wherein the inner conduit layer comprises woven wire. 10. The exhaust conduit of claim 6, wherein the inner conduit layer resides between an innermost conduit layer and the rigid outer conduit layer. 11. The exhaust conduit of claim 10, wherein the innermost conduit layer comprises a rigid perforated material. 12. The exhaust conduit of claim 6, further comprising connection means for connecting the exhaust conduit to the turbine. 13. The exhaust conduit of claim 12, wherein the connection means comprises at least one member selected from a group consisting of a flange, a thread, one or more blades, and a compression fitting. 14. The exhaust conduit of claim 6 capable of withstanding temperatures equal to or greater than approximately 1000째 F. (538째 C.). 15. The exhaust conduit of claim 6, wherein the exhaust conduit reduces noise having frequencies greater than approximately 5,000 Hz at a temperature greater than approximately 1000째 F. (538째 C.). 16. The exhaust conduit of claim 6, wherein the inner conduit has a thickness determined, at least in part, by a turbine blade pass frequency. 17. The exhaust conduit of claim 6, wherein the inner conduit has a thickness determined, at least in part, by one or more frequencies and one or more exhaust temperatures. 18. The exhaust conduit of claim 6, wherein the turbine is part of a turbocharger. 19. An exhaust conduit for receiving exhaust from a turbine, the exhaust conduit comprising: a proximal end having an axis for coaxial alignment with a rotational axis of a turbine wheel of the turbine; a first inner conduit layer comprising perforated steel; a second inner conduit layer comprising woven wire; and a metal outer conduit layer to hold the first inner conduit layer and the second inner conduit layer, to connect the exhaust conduit to the turbine and to receive structural vibrations from the housing wherein the exhaust conduit damps the structural vibrations and absorbs acoustic enemy carried by the exhaust. 20. The exhaust conduit of claim 19, wherein the exhaust conduit connects to the turbine via a compression fitting. 21. The exhaust conduit of claim 19, wherein the outer conduit layer fits into an exhaust outlet of the turbine. 22. The exhaust conduit of claim 19, further comprising a heat shield. 23. The exhaust conduit of claim 22, wherein the heat shield comprises woven wire. 24. The exhaust conduit of claim 16, wherein the metal outer layer comprises corrugations. 25. A turbine housing for housing a turbine wheel, the turbine housing comprising: a cylindrical wall having a cylindrical wall axis for coaxial alignment with a rotational axis of a turbine wheel; an exhaust conduit that damps structural vibrations and absorbs acoustic energy, the exhaust conduit comprising a proximal end having an axis coaxial to the cylindrical wall axis, an impervious metal conduit layer, a perforated metal conduit layer wherein the impervious metal conduit layer substantially surrounds the perforated metal conduit layer and wherein the layers define a substantially annular space therebetween, and a sound absorbing material disposed in the substantially annular space. 26. The turbine housing of claim 25 wherein the impervious metal conduit layer comprises stainless steel.