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Rotor Dynamics: Research and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 1105

Special Issue Editor


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Guest Editor
Department of Applied Mechanics, VŠB-Technical University of Ostrava, 70833 Ostrava, Czech Republic
Interests: rotor dynamics; magnetically sensitive bearings and dampers; mechanical vibration and its attenuation; modeling of mechanical and mechatronic systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Rotors and rotating parts are important, oft-used, and highly loaded components of various machines and machine devices. This Special Issue is devoted to their theoretical analysis and computer and experimental modeling, and to the realization of measurements in the field of rotor dynamics. The goal is to present the latest trends in theoretical research, development, monitoring, vibration investigation, fatigue and service life analysis, use of new materials and technologies, new areas of their application, and new designs, manufacturing, operation conditions, and maintenance processes. The presented articles will contribute to the work of researchers, academic workers, and engineers in the fields of mechanical, material, electrical, and control engineering, aerospace engineering, and aeronautics. The goal is for the latest ideas to conduce to the development of knowledge in classic and newly emerging areas, such as flywheels for energy storage, energy harvesting, cryogenic machines, or micro and nano rotor dynamics.

Prof. Dr. Jaroslav Zapoměl
Guest Editor

Manuscript Submission Information

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Keywords

  • rotor dynamics
  • parametric and nonlinear phenomena in rotor dynamics
  • smart rotor systems
  • rotor dynamics of micro-, nano-, and cryogenic systems
  • multiphysical phenomena in rotor dynamics
  • bearings and dampers
  • rotor control
  • uncertainties, reliability and life predictions of rotating machinery
  • energy storage and harvesting
  • stability and vibration attenuation

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Published Papers (1 paper)

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Research

20 pages, 5498 KiB  
Article
Numerical Analysis of a Self-Acting Gas Bearing Lubricated with a Low-Boiling-Point Medium Using an Advanced Model Based on the Finite Difference Methods and Universal Computational Fluid Dynamics Software
by Małgorzata Bogulicz, Paweł Bagiński and Grzegorz Żywica
Appl. Sci. 2024, 14(17), 7520; https://doi.org/10.3390/app14177520 - 26 Aug 2024
Viewed by 763
Abstract
Methods for determining the characteristics of self-acting (aerodynamic) gas bearings have been developed for many years, but many researchers and engineers still question how sophisticated a model of such bearings should be to obtain reliable results. This is the subject of this article, [...] Read more.
Methods for determining the characteristics of self-acting (aerodynamic) gas bearings have been developed for many years, but many researchers and engineers still question how sophisticated a model of such bearings should be to obtain reliable results. This is the subject of this article, which presents a numerical analysis of aerodynamic gas bearings using two alternative methods: a specialized program based on the finite difference method, and a universal CFD program using the finite volume method. Gas bearings with a nominal diameter of 49 mm, designed for a 10 kW turbogenerator operating at a rotational speed of 40,000 rpm, are analyzed. The vapor of the low-boiling medium, designated HFE-7100, is used as the bearing lubricant. The calculations focus on determining the position of the bearing journal where the bearing achieved the required load capacity and checking the bearing characteristics beyond the nominal operating point. The most important results obtained by the two independent methods are compared, and recommendations are made for those interested in the numerical analysis of self-acting gas bearings. Full article
(This article belongs to the Special Issue Rotor Dynamics: Research and Applications)
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