Method of reducing speckle-interferometer sensitivity for the study of turbomachine elements vibration

Abstract

The article deals with the development of a method for obtaining time-averaged speckle-interferograms with a two-fold period of interference bands. An optical scheme allowing the increase of permissible vibration amplitudes of the analysed elements has been developed. Vibration characterictics of compressor stage 5 blades are subjected to comparative analysis with the use of both the developed method and the traditional methods. The diagram of compressor blade leading edge vibrodisplacements is made up on the basis of the data obtained.

About the authors

A. I. Zhuzhukin

Open Joint Stock Company “Kuznetsov”

Author for correspondence.
Email: cntkknio@yandex.ru

Candidate of Science (Engineering)

Design Engineer of the Design Research Department

Russian Federation

V. A. Solyannikov

Open Joint Stock Company “Kuznetsov”

Email: motor@motor-s.ru

Candidate of Science (Engineering)

Head of the Design Research Department

Russian Federation

References

  1. Makaeva R.Kh., Karimov A.Kh., Tsareva A.M. Determination of GTE part vibration characteristics by the holographic interferometry method // Russian Aeronautics. 2007. V. 50, no.1. P. 110-113. doi: 10.3103/s1068799807010205
  2. Jones R., Wykes C. Holographic and speckle interferometry. M.: Mir Publ., 1986. 328 p.
  3. Komarov S.Yu. Pomekho-ustoychivyy tsifrovoy spekl-interferometr dlya vibrometrii ob"ektov na osnove metoda usredneniya vo vremeni. Diss. cand. techn. nauk [Interference Immune Speckle Interferometer for Vibrometry of Objects Based up-on Time Average Method. Cand.eng. sci. diss]. Samara, 2004. 234 p.
  4. Zhuzhukin A.I., Solyannikov V.A. Using a digital camera in a speckle – interferometer optical scheme for the analysis of static deformations in gas turbine engine elements // Vestnik Samarskogo gosudarstvennogo aerokosmicheskogo universiteta. 2012. T.35, no.4. P.155-161 (In Russ.)
  5. Zhuzhukin A.I., Solyannikov V.A. Speckle-interferometer for the panoramic study of the blades turbine oscillations // Izvestiya Samarskogo nauchnogo tsentra RAN. 2012. V. 14, no.6. P. 59-62(In Russ.)

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