TURBO-MACHINE

摘要

A turbo-machine provided with impellers (1) to rotate in the casing (3), in which means (nozzle (4)) for forming an annular fluid layer flowing along the inner surface of the casing (3) is provided to detect the generation of instability characteristics or sign thereof in the vicinity of a flow rate range where a pump head curve of the turbo-machine rises rightward to indicate instability characteristics, so as to control said fluid flow layer to be generated continuously or intermittently.