Analysis of 1st stage compressor rotor blade stress and vibration amplitudes in one-pass jet engine

• Autorzy: Szczepanik R.
• Języki publikacji: EN

Abstrakty

EN

This paper considers 1st stage compressor blade dynamics in the one-pass jet engines of trainer aircraft. Research was carried out on an engine test bench using the SAD system and its results were compared with those obtained using the tensometric approach. In this paper presented basic dynamic properties of rotor blades, bench test of rotor blade dynamics, Bench tests of the dynamic behaviour of blades subjected to external impacts and then Comparison of strain gauge and SAD tip-timing results. Then discusses the results of tests assessing the accuracy of the 1987 ITWL device by comparing strain gauge signals with those recorded by SAD apparatus in a running engine. It also presented simultaneous vibration readings of all the rotor blades at selected rotation speeds. Also shows that increased stress in these blades may be due to repeated engine surges, normal and hot engine surges, entry into the engine of a foreign object. Among others selection and layout of rotor blades in the 1st stage of a one-pass engine compressor, stress amplitudes for rotor blade, stress in rotor blade, stress amplitudes, free inlet flow and smooth engine acceleration, vibration amplitudes, asynchronous vibrations are presented in the paper.

Słowa kluczowe

EN

diagnostics of aircraft engines; compressor blade dynamics

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 4
• Strony: 441--450
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Szczepanik R.

• Air Force Institute of Technology Ksiecia Boleslawa Street 6, 01-494 Warsaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Gravdahl, J. Y., Modeling and Control of Surge and Rotating Stall in Compressors, Doctor Thesis, Report 98-6-W, Department of Engineering Cybernetics, Norwegian University of Science and Technology, Trondheim, Norway 1998.
• [2] Kocańda, S., Szala, J., Podstawy obliczeń zmęczeniowych, (Fundamentals for Fatigue Computations), PWN, Warszawa 1985.
• [3] Petuhov A. Soprotivlene ustalosti detalej GTD, Maszinostroene 1993, (Fatigue Stregth of Componets in Gas Turbine Engines, Mashinostroyene, 1993).
• [4] Rządkowski, R., Flutter of Turbine Rotor Blades in InviscidFlow, Wydawnictwo Akademii Marynarki Wojennej, Gdynia 2004.
• [5] Rządkowski, R., Gnesin, V., Soliński, M., Szczepanik, R., Analysis of Low-Frequency Forces Affecting Rotor Blades of Gas Turbines, ITWL Publishing House, 2012.
• [6] Szczepanik, R., Kudelski, R., Report from the Project ‘Engineering and Construction of SAD Instruments for Studies on Vibrations of Blades Rotors in Turbine Engines’, Study of ITWL, No. 9121/I, 1988.
• [7] Szczepanik, R., Experimental studies on Dynamic Properties Demonstrated by Rotor Blades under Various Operating Conditions, Scientific Journal No. 26, ITWL, Warsaw 2010.