Methods of detecting rotating surge and stall based on group statistical treatment of centrifugal compressor regime parameters

Abstract

It is noted that one of the most promising trends in the field of detecting turbocompressor stall and revelation of the signs that characterize different forms of the development of gas dynamic instability (stall and rotating surge) is the use of statistical processing methods and signals. A procedure is presented for using statistical functions for analyzing the nonstationary nature of compression in turbocompressors and revelation of signs of stall based on calculating covariation of signals of regime parameters. Results are provided for studies based on analyzing covariation of the signals of regime parameters for centrifugal compressors of different construction that demonstrate the suitability of this parameter for detecting the phenomenon of compression gas dynamic instability. The procedure proposed is used successfully in practice in the form of special software for stall signalers used in centrifugal compressor automation systems.