SYSTEM AND METHOD FOR DETECTING ROTATING STALL IN A CENTRIFUGAL COMPRESSOR, METHOD AND SYSTEM FOR CORRECTING THE SAME

摘要

A system and method for detecting and controlling rotating stall in the diffuser region of the centrifugal compressor is provided. In the present invention is the process starts by sensing and detecting the acoustic energy associated with the initiation of the rotating stall. In addition, a pressure transducer is supposed to have the gas flow path downstream of the impeller, preferably installed on the compressor delivery passage or the diffuser, thereby measuring the sound or acoustic pressure phenomenon. Next, the output signal of the pressure transducer and processed using analog or digital technology is to determine the presence of rotating stall. Rotating stall is detected by comparing with a predetermined threshold corresponding to the amount of energy detected on the basis of the measured acoustic pressure in the presence of rotating stall. Finally, in response to the detection of rotating stall in an appropriate corrective action is taken to change the operation of the centrifugal compressor. ; Centrifugal compressor, diffuser, stall