PRESSURE FLUCTUATION ABSORBING APPARATUS

摘要

Pressure variation absorbing apparatus (10) is mounted adjacent to a moving fluid stream in the diffuser (14) of a centrifugal compressor for absorbing both acoustic and aerodynamic pressure variations. The absorbing apparatus (10) when mounted as a part of the diffuser wall of a centrifugal compressor not only reduces acoustic noise but also absorbs aerodynamic pressure variations increasing the efficiency of the compressor and simultaneously reducing the rate of flow at which surge occurs thereby enlarging the operational flow range of the compressor. A method of absorbing pressure variations in a moving fluid stream is also disclosed.