10.14489/td.2016.02.pp.040-045

2016, 02 February

DOI: 10.14489/td.2016.02.pp.040-045

Posadov V.V., Slobodskoy D.A., Posadova O.L., Kuchin V.A.
DIAGNOSTICS OF VIBRATORY COMBUSTION IN COMBUSTION CHAMBER OF AIRCRAFT GAS TURBINE ENGINE
(pp.40-45)

Abstract. Modern gas turbine engines often contain lowemission combustion chambers with lean airfuel mixtures. It can cause vibratory combustion that is accompanied by thermal and vibrational loads on combustion chamber elements. Therefore, diagnostics of vibratory combustion is an urgent problem. This paper presents diagnostics of vibratory combustion in combustion chamber of aircraft gas turbine engine during bench tests by recording of vibration and airflow pressure pulsations. Computational and experimental methods are used for diagnostics. Modal analysis shows that it is necessary to shift natural frequencies of flame tube parts out of rotor operational speed range.

Keywords: vibratory combustion, combustion chamber, gas turbine engine, natural frequency.

+ - About the Authors Click to collapse

V. V. Posadov, D. A. Slobodskoy, O. L. Posadova, V. A. Kuchin
JSC “NPO ”Saturn”, Rybinsk, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Gerasimenko V. P., Nalesnyi N. B. (2006). Mechanisms of vibration combustion in the combustion chambers. Aviatsionno-kosmicheskaia tekhnika i tekhnologiia. KhAI, 29(3), pp. 48-52.
2. 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.
3. Torkhov M. I., Loznia S. V., Nalesnyi N. B. (2006). Method for detection of vibration combustion of fuel in the combustion chambers of gas turbines. Aviatsionno-kosmicheskaia tekhnika i tekhnologiia. KhAI, 36(10), pp. 103-106.
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