Researches of the dynamic characteristics of the turbine jet engine in flight based on its ground tests

• Autorzy: Golak K. , Lindstedt P. , Grądzki R.

Identyfikatory

DOI

10.5604/12314005.1216468

• Języki publikacji: EN

Abstrakty

EN

Turbine jet engines maintenance (adjustment) actions are performed during standard ground tests, but they are used during the flight. It turns out that the characteristics of the engine determined during the ground tests from the input value "w" introduced by the engine control lever DSS are significantly different from those obtained from disturbance “z" operating in the engine during the aircraft flight. It is noticed, that improvement of the engine control state made by mechanic during aircraft ground tests may cause the deterioration of the engine performance, which is felt by the pilot. The article presents a method that allows determining the basic characteristics of the engine in flight based only on the signals measured during testing ground. This method is based on measurement the major engine signals n – engine rpm, p4 – turbine discharge total pressure, p2 – low pressure compressor inlet, mp – fuel usage, then the designation of synthetic signals y=n/p4 (which describes the engine output), u=mp/p2 (describes engine input) and further their own and cross correlation function. Next, the power spectral density functions of these synthetic signals were calculated. Power spectral density functions is a basis to determine the spectral transfer function HW(jω) (during the ground tests) and HZ(jω) (in flight) which are the basis to determine the characteristics (step response) of the turbine jet engine in flight and during ground tests.

Słowa kluczowe

EN

jet engine; adjustment; ground tests; engine condition; aircraft engine maintenance

• 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: 2016
• Tom: Vol. 23, No. 3
• Strony: 151--156
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Golak K.

• Bialystok University of Technology, Faculty of Mechanical Engineering Wiejska Street 45 C, 15-351 Bialystok, Poland tel.:[phone]

autor

Lindstedt P.

• Air Force Institute of Technology Księcia Bolesława Street 6, P.O. Box 96, 01-494 Warsaw, Poland tel.: [phone]

autor

Grądzki R.

• Bialystok University of Technology, Faculty of Mechanical Engineering Wiejska Street 45 C, 15-351 Bialystok, Poland tel.:[phone]

Bibliografia

• [1] Balicki, W., Szczeciński, S., Chachurski, R., Szczeciński, J., Effect of the atmosphere on the performances of aviation turbine engines, Acta Mechanica et Automatica, Vol. 8, No. 2, 2014.
• [2] Bendat, J. S., Piersol, A. G., Engineering Applications of Correlation and Spectral Analysis, 2nd Edition, Wiley 1993.
• [3] Bodner, W. A., Automatyka silników lotniczych, Wydawnictwo Ministerstwa Obrony Narodowej, Warszawa 1958.
• [4] Golak, K., Method of regulation condition assessment of turbine jet engine in flight basing on signals recorded during ground tests, Journal of KONES, Vol. 19, No. 3, Warsaw 2012.
• [5] Golak, K., Lindstedt, P., Grądzki, R., Studies of the jet engine control quality based on its response to the disturbance inflicted on the object, designated from its response to the set point inflicted to the controller, Safety and Reliability: Methodology and Applications, Proceedings of the European Safety and Reliability Conference: ESREL, 2014.
• [6] Lindstedt, P., Golak, K., Premises of parametrical assessment of turbojet engine in flight regulation condition during ground test, Acta Mechanica et Automatica, Vol. 6, No. 1, 2012.
• [7] Pawlak, W., Computer simulation of transient processes in a turbojet engine, with special attention to amplitudes of thermal shocks in some selected fault models of operations, The Archive of Mechanical Engineering, Vol. LIV, No. 3, 2007.
• [8] Sołodownikow, W. W., Dynamika statystyczna liniowych układów sterowania automatycznego, WNT, 1964.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.