Method for detecting rotating stall in a compressor

Details Method for detecting rotating stall in a compressor Method for detecting rotating stall in a compressor

2011-03-15

2011-03-15

Look, Edward (Department: 3745)

Rotary kinetic fluid motors or pumps

With inspection, signaling, indicating or measuring means

C415S001000, C415S914000

Reexamination Certificate

active

07905702

ABSTRACT:
A system and method is provided for detecting and controlling rotating stall in the diffuser region of a compressor. A pressure transducer is placed in the gas flow path downstream of the impeller, preferably in the compressor discharge passage or the diffuser, to measure the sound or acoustic pressure phenomenon. Next, the signal from the pressure transducer is processed either using analog or digital techniques to determine the presence of rotating stall. Rotating stall is detected by comparing the detected energy amount, which detected energy amount is based on the measured acoustic pressure, with a predetermined threshold amount corresponding to the presence of rotating stall. Finally, an appropriate corrective action is taken to change the operation of the compressor in response to the detection of rotating stall.

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patent: 6857845 (2005-02-01), Stabley et al.
patent: 2004/0037693 (2004-02-01), Stabley et al.

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