Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Pump outlet or casing portion expands in downstream direction
Patent
1975-12-10
1977-06-07
Raduazo, Henry F.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Pump outlet or casing portion expands in downstream direction
415211, F04D 2944
Patent
active
040279979
ABSTRACT:
A diffuser provides a transition from a centrifugal compressor to the annular combustion chamber of a gas turbine engine. The diffuser comprises a plurality of linear passages which gradually merge radially outward from a circular cross-section to an outlet having a near rectangular cross-section defined by two flat opposing parallel sides and two opposing curved sides. The two opposing curved sides produce a razor sharp trailing edge which maximizes the diffuser efficiency. The linearity of the diffuser passage allows the diffuser to be manufactured to close tolerances by electric discharge milling an annular plate in a manner which assures uniformity and consistency between diffusers. The near rectangular shape of the outlet of the diffuser passages optimizes flow distribution to the annular combustion chamber. A transition region and deswirler section downstream of the near rectangular outlet may be provided to match the diffuser flow path to the combustor geometry.
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General Electric Company
Johnson, Jr. James W.
Lawrence Derek P.
Raduazo Henry F.
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