Control of centrifugal compressors

Details Control of centrifugal compressors Control of centrifugal compressors

1977-08-02

1979-05-29

Husar, C. J.

Rotary kinetic fluid motors or pumps

Method of operation

415 17, 415 27, 417 28, F01D 1900

Patent

active

041565789

ABSTRACT:
Surging of a centrifugal compressor is avoided by ensuring that in operation ##EQU1## WHERE K and k are parameters whose values depend on the characteristics of the compressor, g is the acceleration due to gravity, h.sub.p is the polytropic head produced by the compressor, Vc is the velocity of sound in said inlet gas, and Mn (the Mach Number) is the ratio of the flow velocity V of the gas at the inlet to the compressor to the velocity of sound Vc therein. This is normally effected by arranging that ##EQU2## where .DELTA..sub.p is the differential pressure across a throttling member disposed in an inlet duct of the compressor, P.sub.1 is the compressor inlet pressure, and P.sub.2 is the compressor outlet pressure.

REFERENCES:
patent: 3240422 (1966-03-01), Pettersen et al.
patent: 3292846 (1966-12-01), Harper et al.
patent: 3362626 (1968-01-01), Schlirf
patent: 3737252 (1973-06-01), Pilarczyk et al.
patent: 4046490 (1977-09-01), Rutshtein et al.
Principles of Turbomachines, D. Sheppard; MacMillan Co., New York, 1956, pp. 217 and 218.

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