Assessment of gas turbine engine airfoil surface microstructure

Abstract


We propose a new approach to the assessment of surface roughness of gas turbine engine airfoil after polishing. The micro-geometry of the blade surfaces was investigated with the use of an electrooptical system on the basis of computing the average amplitude of the variable component of the autocorrelation function obtained as a result of computer processing of the surface video images. The use of the electrooptical method of assessing the surface micro-geometry of compressor blades and turbine blades makes it possible to construct the fields of surface roughness and stress concentration factor, as well as to analyze the technology of finishing treatment in more depth.


About the authors

N. V. Nosov

Samara State Technical University

Author for correspondence.
Email: nosov@sangtu.ru

Russian Federation

Doctor of Science (Engineering), Professor
Head of the Technology of Machine Building Department

A. D. Abramov

Samara State Technical University

Email: esib@samgtu.ru

Russian Federation

Candidate of Science (Engineering)
Associate Professor of the Electronic Systems and Information Security Department

S. I. Kosulin

Samara State Technical University

Email: nosov@sangtu.ru

Russian Federation

Postgraduate student

References

  1. Abramov A.D., Nosov N.V., Podsekin I.A., Voronin V.N. Assessment of surface roughness by an electrooptical method. Vestnik of Samara State Technical University. Technical Sciences Series. 2005. No. 33. P. 89-94. (In Russ.)
  2. Abramov A.D. Assessment of gas turbine engine blades surface micro-geometry on the basis of their autocorrelation functions. Vestnik of Samara State Technical University. Technical Sciences Series. 2007. No. 2 (20). P. 117-123. (In Russ.)
  3. Abramov A.D., Nikonov A.I., Nosov N.V. Sposob kontrolya sherokhovatosti poverkhnosti izdeliya [Method of monitoring article surface roughness]. Patent RF, no.2413179, 2011. (Publ. 27.02.2011, bull. no. 6).
  4. Khusu A.P., Vitenberg Yu.R., Pal'mov V.A. Sherokhovatost' poverkhnostey. Teoretiko-veroyatnostnyy podkhod [Surface roughness. Probability-theoretical approach]. Moscow: Nauka Publ., 1975. 344 p.

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