Centrifugal compressor/pump with fluid dynamically variable geom

Details Centrifugal compressor/pump with fluid dynamically variable geom Centrifugal compressor/pump with fluid dynamically variable geom

1989-03-13

1991-04-30

Kwon, John T.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Vane or deflector

4152112, 415914, F04D 100

Patent

active

050113712

ABSTRACT:
A centrifugal fluid machine such as a pump or compressor has a diffuser with fixed vane geometry which provides significantly increased range, as compared to conventional fixed geometry diffusers, by developing what appear to be flow accelerating stall bubbles in the diffuser throat that forestall the onset of surge in the portion of the operating range near and approaching the surge point. The stall bubbles are created by fixing the suction sides of the vanes, relative to the flow impinging upon their leading edges at angles slightly more radial than is conventional, thereby creating higher than normal angles of incidence with the flow delivered by the impeller.

REFERENCES:
patent: 3699055 (1972-02-01), Davis
patent: 3719430 (1973-03-01), Blair et al.
patent: 4455121 (1984-06-01), Jen
patent: 4815935 (1989-03-01), Gottemoller

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