Methods and apparatuses for avoiding surging phenomena in compre

Details Methods and apparatuses for avoiding surging phenomena in compre Methods and apparatuses for avoiding surging phenomena in compre

1978-05-02

1980-06-03

Vrablik, John J.

Rotary kinetic fluid motors or pumps

Method of operation

415 20, 415 49, F01B 2502, F01D 1708, F04D 2702

Patent

active

042059410

ABSTRACT:
The invention relates to a centrifugal compressor comprising an impeller not comprising distributor blading upstream of the impeller, a pressure probe and regulator means controlled by the probe and arranged to act on the flow conditions downstream or upstream of the compressor to avoid the risk of surging. The probe is disposed upstream of the impeller of the compressor and being arranged to detect the critical direction of the absolute velocity of the fluid and to measure the critical value of the radial gradient of the static pressure beyond which the compressor runs the risk of being subjected to surging. The said probe is provided with directional pressure ports, situated at the same distance from the wall of the intake casing and disposed symmetrically with respect to the critical direction of the absolute velocity of the fluid beyond which a risk of surging exists, and radial pressure gradient ports, situated one nearer to the said wall and the other farther from the said wall (with respect to the two directional pressure inlets).

REFERENCES:
patent: 2470565 (1949-05-01), Loss
patent: 2696345 (1954-12-01), Hopper
patent: 3292845 (1966-12-01), Hens et al.
patent: 3901620 (1975-08-01), Boyce

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