Running Characteristics of Aerodynamic Bearing with Self-Lifting Capability at Low Rotational Speed | Zendy

T.A. Stolarski | Zendy

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Running Characteristics of Aerodynamic Bearing with Self-Lifting Capability at Low Rotational Speed

Author(s) -

T.A. Stolarski

Publication year - 2011

Publication title -

advances in tribology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.325

H-Index - 17

eISSN - 1687-5923

pISSN - 1687-5915

DOI - 10.1155/2011/973740

Subject(s) - aerodynamics , fast fourier transform , bearing (navigation) , instability , rotor (electric) , rotational speed , rigid rotor , mechanics , computer simulation , helicopter rotor , materials science , structural engineering , engineering , control theory (sociology) , physics , computer science , mechanical engineering , algorithm , control (management) , astronomy , artificial intelligence

An aerodynamic journal bearing that is capable of self-generating squeeze-film pressure is presented and its dynamic characteristics investigated numerically and experimentally. A numerical method based on a time-marching static model was applied to assess the orbit trajectory path of the rotor upon a perturbation. Experimental results were obtained to validate the effect of the self-generated squeeze-film pressure on the stability of the rotor. Analyzing the Fast Fourier Transform (FFT) responses of the rotor orbits enabled identification of self-excited whirling instabilities. Both numerical and experimental results showed that increasing the squeeze-film effect of the bearing could raise the threshold speed of instability

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