Early detection of vibration behaviour of aircraft engine multistage axial compressor in pre-surge states during rig testing

Abstract


Surge is a dangerous aero-elastic phenomenon. When surge occurs a shock wave originates in the gas path of the compressor, which damages individual elements of the compressor, as well as the test beds for measuring the parameters of the workflow. Therefore, early diagnostics of pre-surge states of multistage axial compressors of modern aircraft engines characterized by extremely high aerodynamic loading and small radial clearances between the rotor and the stator is an urgent task. The paper presents the results of the analysis of dynamic processes that take place during throttling of aircraft engine multistage compressors in test bed conditions.  Diagnostic features of the pre-surge state of the compressor were revealed in the signals from strain gauges mounted on the blades, and the signals from sensors of static pressure pulsations installed in the compressor housing. The research was carried out using up-to-date methods of processing and analysis of the signals of dynamic processes based on the fast Fourier transform and wavelet analysis using a 3D representation of the results of the study. The results of the study indicate the possibility of early diagnosis of surge, and also show that several forms of axial vibrations and their respective acoustic frequencies depending on the size of connected masses may occur in the case of loss of gas dynamic stability. The developed methods and means are proposed to be used for the creation of automated systems for preventing surge in compressor rig testing to determine the gas dynamic stability margin.


About the authors

A. A. Khorikov

Central Institute of Aviation Motors named after P.I. Baranov, Moscow

Author for correspondence.
Email: khorikov@rtc.ciam.ru

Russian Federation

Doctor of Science (Engineering), Professor

Head of Department

S. Yu. Danilkin

Central Institute of Aviation Motors named after P.I. Baranov, Moscow

Email: danilkin@rtc.ciam.ru

Russian Federation

Division Head

T. I. Mazikina

Central Institute of Aviation Motors named after P.I. Baranov, Moscow

Email: dep200@rtc.ciam.ru

Russian Federation

Project Design Leader

References

  1. Kolesinsky L.D., Makasheva O.V. Analysis of unsteady flow phenomena in a multi-stage axial compressor is running in the stand, with the surge. TsAGI Science Journal. 2008. V. XXXIX, No 4. P. 46-59. (In Russ.)
  2. Mohammadsadegi, Chumachenko D.L., Chigrin V.S. Experimental study of unstable modes of the compressor GTE. Gas turbo technology. 2014. No. 8. P. 42-47. (In Russ.)
  3. Kazakevitch V.V. Avtokolebaniya (pompazh) v kompressorakh [Self-oscillations (surge) in compressors]. Moscow: Mashinostroenie Publ., 1974. 263 p.
  4. Lyapunov A.M. Obshchaya zadacha ob ustoychivosti dvizheniya [The general problem of motion stability]. Moscow: GTTI Publ., 1935. 464 p.
  5. Moiseev N.D. Some methods of the theory of technical stability. Part 1. Works VVAKA. 1945. Issue 135. Р. 26. (In Russ.)
  6. Dremin I.M., Ivanov O.V., Nechitailo V.A. Wavelets and their uses. Physics-Uspekhi. 2001. V. 44, no. 5. P. 447-478. doi.org/10.1070/pu2001v044n05abeh000918
  7. Bendat J., Peirsol A. Primeneniya korrelyatsionnogo i spektral'nogo analiza [Applications of correlation and spectral analysis]. Moscow: Mir Publ., 1983. 310 p.
  8. WinPos signal processing package. User Manual, Revision 3.2, BLIG, 409801.002-04 90. Mytishi: NPP «MERA» Publ., 2014. 184 p.

Statistics

Views

Abstract - 67

PDF (Russian) - 41

Article Metrics

Metrics Loading ...

PlumX

Dimensions

Refbacks

  • There are currently no refbacks.

Copyright (c) 2015 VESTNIK of the Samara State Aerospace University

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies