Influence of engine rotational speed on the natural frequencies of the turbine blade

• Autorzy: Witek L.

Identyfikatory

DOI

10.5604/12314005.1213707

• Języki publikacji: EN

Abstrakty

EN

In this work, the influence of the engine rotational speed on the natural frequencies of the turbine blade was investigated. In first part of the work the experimental modal analysis of the blade were made using the vibration system. The investigated blade was fixed to the movable head of the shaker. The blade amplitude was measured using the piezoelectric accelerometers. As results of experimental modal analysis, the resonant frequencies for first three modes of vibration were determined. In the next step of the work, the numerical models of the blades with different size of the finite elements were performed in order to check the convergence of the numerical solution. For each models the natural frequencies were determined for the non-rotated blade. The numerical results were next compared to the results of experimental modal analysis. After this comparison, one model only was selected for the further computations. In the last part of the work, the complex multi-steps analysis was performed in order to investigate the influence of turbine rotational speed on the modes and natural frequencies of the blade. Obtained results are important from both the research and also the practical point of view and have an influence on reliability of the engine.

Słowa kluczowe

EN

turbine blade; modal analysis; resonant frequency; finite element method; experimental analysis

• 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. 1
• Strony: 421--428
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Witek L.

• Rzeszow University of Technology, Department of Aircraft and Aero Engines Powstancow Warszawy Avenue 8, 35-959 Rzeszow, Poland tel.:[phone], fax. [phone]

Bibliografia

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• [5] Kowalski, T., Mamrowicz, J. Witek, L., Numerical stress and fatigue analysis of the first stage power turbine for helicopter engine, Proceedings of the 24-th International Committee on Aeronautical Fatigue (ICAF) Symposium, Naples, Italy 2007.
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• [7] Michailov, P. B., Sprawocznik po Metaliczeskim Matierialam Turbino-i Motorostroenija, Petersburg, 1961.
• [8] MSC-Patran 2009 Users Manual, MSC Corporation, Los Angeles 2009.
• [9] Papanikos, P., Meguid, S. A., Stjepanovic, Z., Three-dimensional nonlinear finite element analysis of dovetail joints in aero-engine discs, Finite Element Analysis and Design, Vol. 29, pp. 173-86, 1998.
• [10] Park, M., Hwang Young, H., Choi, Y. S, Kim, T. G., Analysis of a J69-T-25 engine turbine blade fracture, Engineering Failure Analysis, Vol. 9, pp. 593-601, 2002.
• [11] Poursaeidi, E., Hosein, B., Fatigue crack growth simulation in a first stage of compressor blade, Engineering Failure Analysis, Vol. 45, pp. 314-325, 2014.
• [12] Song, K. S., Kim, S. G., Jung, D., Hwang, Y. H., Analysis of the fracture of a turbine blade on a turbojet engine, Engineering Failure Analysis, Vol. 14, pp. 877-883, 2007.
• [13] Witek L., Failure analysis of turbine disc of an aero engine, Engineering Failure Analysis, Vol. 13, 9-17, 2006.
• [14] Witek, L., Fatigue investigations of the compressor blades with mechanical defects, Key Engineering Materials, Vol. 598, pp. 269-274, 2014.
• [15] Witek, L., Wyzga, B., Analiza wpływu wybranych rodzajów obciążeń na częstotliwość drgań rezonansowych łopatki turbiny silnika śmigłowcowego, Logistyka, Vol. 12, pp. 11187-11195, 2014.

Uwagi

PL

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