Axial diffuser for a centrifugal compressor

Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector

Reexamination Certificate

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C415S211100, C415S224500

Reexamination Certificate

active

08038392

ABSTRACT:
The effective efficiency of a centrifugal compressor can be improved by achieving a uniform distribution of fluid velocity across the outlet end of a fluid passage of an axial diffuser for the centrifugal compressor and a high static pressure recovery ratio Cp in the axial diffuser passage. The cross section of each axial diffuser passage is configured such that a relatively high velocity fluid flow in an upstream part of the diffuser passage is directed toward a negative pressure side of a cross section thereof. It can be accomplished by directing a minor axis of a cross section of the diffuser passage substantially perpendicularly to a direction directed from a center of the cross section of the diffuser passage to the central axial line of an impeller or directing the minor axis toward the central axial line of the impeller.

REFERENCES:
patent: 3837762 (1974-09-01), Lee
patent: 5944482 (1999-08-01), Cronin
patent: 6280139 (2001-08-01), Romani et al.
patent: 6537028 (2003-03-01), Izumi et al.
patent: 2005/0042087 (2005-02-01), Hamer et al.
patent: 2009/0304502 (2009-12-01), Nolcheff
patent: 2010/0158722 (2010-06-01), Sumser et al.
patent: 2002-098093 (2002-04-01), None
patent: 2002535553 (2002-10-01), None

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