10.14489/td.2016.03.pp.034-038

2016, 03 March

DOI: 10.14489/td.2016.03.pp.034-038

Posadov V.V. (jr.), Posadov V.V., Remizov A.E.
ALGORITHMS OF AERODYNAMIC AND AEROELASTIC VIBRATIONS DIAGNOSTICS IN COMPRESSOR OF GAS TURBINE ENGINE
(pp. 34-38)

Abstract. When operating a gas turbine engine, the aerodynamic and aeroelastic vibrations (rotating stall and flutter respectively) can occur in a compressor on some special conditions. This paper is based on a research of informative diagnostic parameters. The engine tests were performed on the test bench with a crosswind generator. During the tests the insensitivity of the fan blades to the flutter was analyzed in the wide range of operational modes. The limits of the gasdynamic stability were also determined. The algorithms of aerodynamic and aeroelastic vibrations diagnostics were developed based on the research. One of the algorithms uses damping parameters to perform diagnostics of aerodynamic and aeroelastic vibrations. Another is based on a parameter with high sensitivity to changes in the technical condition of the gas turbine engine parts.

Keywords: gas turbine engine, fan, diagnostics, flutter, rotating stall, damping, coefficient of excess.

+ - About the Authors Click to collapse

V. V. Posadov (jr.), V. V. Posadov

JSC “NPO “Saturn”, Rybinsk, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

A. E. Remizov
Rybinsk State Aviation Technical University, Rybinsk, Russia

+ - References Click to collapse

1. Posadov V. V., Posadov V. V., Eremin A. A., Remizov A. E. (2013). Study the nature of stall flutter of rotor of aircraft gas turbine engine compressor. Proceedings of the Internaional scientific and technical conference «Klimov’s readings – 2013». St. Petersburg, pp. 110-118.
2. Posadova O. L., Posadov V. V. (2011). Method for diagnostics of auto oscillations of the turbomachine impeller. Ru Patent No. 2411484. Russian Federation.
3. Posadov V. V., Posadov V. V., Firsov A. V. (2015). Prediction and diagnostics of aircraft gas turbine engine compressor flutter. Kontrol'. Diagnostika, (1), pp. 52-60. doi: 10.14489/td.2015.01.pp.052-060
4. Kurkov A., Dicus J. (1978). Synthesis of blade flutter vibratory patterns using stationary transducers. ASME Paper 1978. N78-GT-160, Apr.
5. Firsov A. V., Posadov V. V. (2011). Experience of identification gas turbine engines malfunctions with narrowband spectral vibration analysis. Kontrol'. Diagnostika, (12), pp. 51-59.
6. Genkin M. D., Sokolova A. G. (1987). Vibroacoustic diagnostics of machines and mechansims. Moscow: Mashinostroenie.
7. Posadov V. V., Firsov A. V., Posadov V. V. (2014). Method for oscillations diagnostics of the turbomachine impeller. Ru patent No. 2511773. Russian Federation.

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

DOI: 10.14489/td.2016.03.pp.034-038

Copy the article DOI and follow the link https://id-spektr.ru/product/pokupka-elektronnoy-stati-iz-zhurnala-kontrol-diagnostika

Please specify the article DOI in the order comments.