Fluid compressors

摘要

An axial flow or centrifugal flow compressor includes a casing treatment for enhancing the compressor's fluid dynamic stability. The casing treatment comprises a circumferentially extending compartment (62), typically comprising a voluminous pressure compensation chamber (64) and a single passage (66) circumferentially coextensive with the chamber, for establishing fluid communication between the chamber and the flowpath. The compartment attenuates the inordinate circumferential pressure difference across the tips of excessively loaded compressor blades (16), making the compressor less susceptible to tip vortex induced instabilities.