The flutter effect in rotating machines

• Autorzy: Kiciński, J.
• Języki publikacji: EN

Abstrakty

EN

The considerations presented in the paper relate to one of the most intriguing phenomena, which is the development of oil whirls and oil whips in rotors with journal bearings. This effect is sometimes referred to as flutter, as its origin is in some relation to self-exciting vibrations of the system. Despite the fact that the flutter has been an object of investigation in numerous research centres all over the world, its nature has not been sufficiently recognized yet. The present paper delivers a description of particular phases of development of the hydrodynamic instability and proposes diagnostic determinants for this state. The object of investigations also included bearings with hybrid lubrication and siphon pockets in the oil gaps. The answer has been received to the question whether the self-exciting vibrations in rotating machines can be avoided, or reduced by means of additional oil supply having the form of siphon oil.

Słowa kluczowe

EN

flutter; journal bearings; hydrodynamic instability; rotor dynamics

• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2004
• Tom: Vol. 52, nr 3
• Strony: 195-207
• Opis fizyczny: Bibliogr. 8 poz., 15 rys.

Twórcy

autor

Kiciński, J.

• Institute of Fluid–Flow Machinery, Polish Academy of Sciences, 14 Fiszera St., 80–952 Gdańsk, Poland,

Bibliografia

• [1] Z. Walczyk and J. Kiciński, Dynamics of Turbosets, Technical University of Gdańsk Publishers, Gdańsk, 2001 (in Polish).
• [2] J. Kiciński, Theory and Investigations of Hydrodynamic Journal Bearings, Ossolineum Publishers, Wrocław-Warszawa-Kraków, 1994 (in Polish).
• [3] J. Kiciński, R. Drozdowski and P. Materny, “The nonlinear analysis of the effect of support construction properties on the dynamic properties of multi-support rotor systems”, J. Sound Vibration 206(4), 523–539 (1997).
• [4] J. Kiciński, R. Drozdowski and P. Materny, “Nonlinear Model of Vibrations in a Rotor – Bearings System”, J. Vib. Control 4(5), 519–540 (1998).
• [5] J. Kiciński and A. Markiewicz-Kicińska, “Coupled nonlinear vibrations in multi-support rotors founded on slide bearing”, Proceedings of VETOMAC-1 Conference, Bangalore, INDIA, CP 047, (2000).
• [6] J. Kiciński and W. Cholewa, “Diagnostic system DT200-1 for large power (200 MW) turbosets”, IFFM Proceedings, Gdansk, Poland, 1998.
• [7] J. Kiciński, “Coupled non-linear vibrations in 200 MW turbosets”, IFToMM Sixth International Conference on Rotor Dynamics- Proceedings 1, 520–530 (2002).
• [8] J. Kiciński and A. Markiewicz-Kicińska, “Coupled nonlinear vibrations in multi-supported rotors founded on slide bearings, advances in vibration engineering”, The Scientific Journal of the Vibration Institute of India 1(2), 141–152.