排气管气腔对离心压缩机喘振的影响

To further study the variation law of aerodynamic parameters in inlet and outlet pipes during the compressor surge process, this paper uses high-frequency hot-wire probes and pressure sensors to obtain the test data of the centrifugal compressor system with or without exhaust pipe plenum chamber during the surge process. According to the analysis, under the condition of the same valve opening, the surge frequency of the compressor system with the exhaust pipe plenum chamber is about 1.168 Hz, and the large negative flow area (backflow) can be detected in both the inlet and outlet pipes, which indicates that the compressor has entered the deep surge condition. The surge frequency of the compressor system without the exhaust gas chamber is about 3.968 Hz, and the large negative flow area (backflow) is only detected at the inlet, which indicates that the compressor is still in a mild surge condition.