Special Issue on Wavelet Applications in Fluid Mechanics and VisualizationNo Access

IDENTIFICATION OF ROTATING PRESSURE WAVES IN A CENTRIFUGAL COMPRESSOR DIFFUSER BY MEANS OF THE WAVELET CROSS-CORRELATION

LONGIN HORODKO

Institute of Turbomachinery, Technical University of Lodz, 219/223 Wolczanska Str., 93-005 Lodz, Poland

https://doi.org/10.1142/S0219691306001312Cited by:11 (Source: Crossref)

Abstract

Rotating stall is usually the first symptom of approaching compressor instability. It consists of zones of a turbulent flow, which rotate slower than the compressor impeller. The wavelet cross-correlation function was applied to detect rotating objects, whereas the continuous wavelet transform was used to identify different phases of the compressor operation. These methods of signal analysis enabled the identification of rotating pressure waves that appear during all phases of operation. Some of them have several times shorter wavelength than these manifested by the rotating stall. What is more, rotating pressure waves, though very weak, appear also during the stable compressor operation.

Keywords:

AMSC: 42C40, 76-05, 76U05

References

W. Kryllowicz, Sci. Bull. Tech. Univ. Lodz 889, 1 (2001). Google Scholar
R. Pampreen , Compressor Surge and Stall ( Concepts ETI , 1993 ) . Google Scholar
B. Ribi and G. Gyarmathy, Impeller rotating stall as a trigger for the transition from mild to deep surge in a subsonic centrifugal compressor, Am. Soc. Mech. Eng., Paper No. 93-GT-234 (1993) . Google Scholar
E. Lennemann and J. Howard, ASME J. Eng. Power 97, 65 (1971). Google Scholar
J. Chen, H. Hasemann, L. Shi and M. Rautenberg, Stall inception behavior in a centrifugal compressor, Am. Soc. Mech. Eng., Paper No. 94-GT-159 (1994) . Google Scholar
Y. N. Chen, U. Seidel, J. Chen, U. Haupt and M. Rautenberg, Experimental investigation of the flow field of deep rotating stall in a centrifugal compressor, Am. Soc. Mech. Eng., Paper No. 94-GT-160 (1994) . Google Scholar
H. Watanabe, S. Konomi and I. Ariga, Transient process of rotating stall in radial vaneless diffusers, Am. Soc. Mech. Eng., Paper No. 94-GT-161 (1994) . Google Scholar
M. P. Wernet, M. M. Bright and G. J. Skoch, ASME J. Turbomach. 123, 418 (2001). Crossref, Web of Science, Google Scholar
H. Li, ASME J. Fluids Eng. 120, 778 (1998). Crossref, Web of Science, Google Scholar
J. Chenet al., Stall inception behavior in centrifugal compressor re-examined using wavelet method, Int. Symp. Exp. Computat. Aerothermodyn. Internal Flows (2001) pp. 149–156. Google Scholar
L. Horodko, and W. Kryllowicz, Investigation of the rotating stall in a centrifugal compressor, Am. Soc. Mech. Eng., Paper No. FEDSM2002–31113 (2002) . Google Scholar
L. Horodko, W. Kryllowicz and P. Hanausek, Sci. Bull. Tech. Univ. Lodz 122, 199 (2002). Web of Science, Google Scholar
R. Carmona , W.-L. Hwang and B. Torresani , Practical Time-Frequency Analysis ( Academic Press , 1998 ) . Google Scholar