Hydrodynamic effects influence on lateral vibrations of rigid symmetric rotor with fluid-film bearings
Leonid Savin1 , Sergey Majorov2 , Alexey Kornaev3
1, 2, 3Orel State University, Orel, Russia
Vibroengineering PROCEDIA, Vol. 8, 2016, p. 322-327.
Received 7 September 2016; accepted 12 September 2016; published 7 October 2016
The paper covers the questions of modeling and research different hydrodynamic effects, that influence the occurrence of lateral vibrations in rotor systems with fluid-film bearings. The present research is aimed at developing rotor dynamics as one of the fields of science, as well as at developing the analysis and diagnostics methods of the dynamic condition of the rotor systems with fluid-film bearings. The results of the present research consist of a complex of the developed mathematical models and the numerical methods of solutions for centering and Magnus effects in fluid-film bearing and its influence on dynamics of rotor system. The significance of the results is determined by a wide range of applications in various designs of single-shaft rotor systems. The novelty of the obtained results is in the developed mathematical models that allow solving the analysis problems of lateral vibrations in the rotor systems with fluid-film bearings, given a nonlinear formulation of the problem; which significantly broadens the spectrum of the analyzed parameters domain.
Keywords: rotor system, fluid-film bearing, rotordynamics, hydrodynamic lubrication theory, computational hydrodynamics.
This work was partly supported by an RSF Grant, Project 16-16-00186 “Planning of Optimal Energy Efficient Trajectories of Rotors in Mechatronic Modules in Complex Rheology Media”.
- Adams M. Rotating Machinery Vibration: from Analysis to Troubleshooting. Marcel Dekker Inc., New York, 2001. [CrossRef]
- Yamamoto T., Ishida Y. Linear and Nonlinear Rotordynamics. A Modern Treatment with Applications. John Willey and Sons, New York, 2001. [CrossRef]
- Kramer E. Dynamics of Rotors and Foundations. Springer Verlag, Berlin, 1993. [CrossRef]
- Childs D. Turbomachinery Rotordynamics: Phenomena, Modeling and Analysis. John Willey and Sons, New York, 1993. [CrossRef]
- LiuH., Xu H., Ellison P., Jin Z. Application of computational fluid dynamics and fluid-structure interaction method to the lubrication study of a rotor-bearing system. Tribology Letters, Vol. 38, Issue 3, 2010, p. 325-336. [CrossRef]
- Ravikovich Y., Ermilov Y., Pugachev A., Matushkin A., Kholobtsev D. Prediction of operational characteristics of fluid-film and gas bearings for high-speed turbomachinery using computational fluid dynamics. Proceeding 29th International Council of Aeronautical Sciences, St. Petersburg, 2014, p. 119-125. [CrossRef]
- Lomakin A. Calculation critical rotor speed and conditions of rotor dynamic stability for high-pressure pumps subject seal forces Energomashinostroenye, Vol. 4, 1958, p. 1-5, (in Russian). [CrossRef]
- Marcynkovsky V. Hydrodynamics of Orifice Channels. Sumskoy Gosuniversity, Sumy, 2002, (in Russian). [CrossRef]
- San Andres L., Soulas T., Fayolle P. A bulk flow model of angled injection Lomakin bearing. Journal of Engineering for Gas Turbines and Power, Vol. 129, 2007, p. 195-204. [CrossRef]
- Lewis R., Nithiarasu P., Seetharamu K. Fundamentals of the Finite Element Method for Heat and Fluid Flow. John Willey and Sons, New York, 2004. [CrossRef]