Results 21 to 30 of about 3,667,485 (307)
Review of vortex methods for rotor aerodynamics and wake dynamics
Advances in Aerodynamics, 2022 Electric vertical take-off and landing (eVTOL) aircraft with multiple lifting rotors or prop-rotors have received significant attention in recent years due to their great potential for next-generation urban air mobility (UAM).
H. Lee +3 more
semanticscholar +1 more source
Rotors and the Dynamics of Cardiac Fibrillation [PDF]
Circulation Research, 2013 The objective of this article is to present a broad review of the role of cardiac electric rotors and their accompanying spiral waves in the mechanism of cardiac fibrillation. At the outset, we present a brief historical overview regarding reentry and then discuss the basic concepts and terminologies pertaining to rotors and their initiation ...
Sandeep V, Pandit, José, Jalife
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Typical Fault Modeling and Vibration Characteristics of the Turbocharger Rotor System
Machines, 2023 To study the typical failure mechanism (rotor unbalance, rotor friction, and rotor crack) and vibration characteristics of the turbocharger rotor system, a rotor system dynamics simulation model was established by an improved four-node aggregate ...
Jiahao Wang +6 more
doaj +1 more source
Rotor Dynamic Modeling and Analysis of a Flywheel Rotor [PDF]
Advances in Computer Science Research, 2015 misbaw6@yahoo.com This paper presents rotordynamic modeling and performance analyses of a flywheel energy storage system rotor that utilizes a hybrid magnetic bearing having an energy storage capacity of 220 W h at its operating speed of 20,000rpm. A rotor model designed in solid works 13 and imported into ansys 14.5 is presented with some its main ...
Misbawu Adam +2 more
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Revisiting Rotor Rigid Body Modes: Parametric Study of Stability
International Journal of Rotating Machinery, 1999 This paper presents an analytical model of a rigid rotor supported in two fluid film bearings with an emphasis on predicting the instability threshold speed.
Nathan B. Littrell +2 more
doaj +1 more source
Dynamics of Anisotropically Supported Rotors
International Journal of Rotating Machinery, 1997 The paper discusses dynamic effects occurring in machinery rotors supported in bearings and pedestals with laterally different characteristics. In the considered rotor model the anisotropy of radial stiffness and tangential (“cross”) stiffness components
Agnes Muszynska +2 more
doaj +1 more source
Friction, 2019 In this paper, a square textured parallel slider is considered for a study to improve the hydrodynamic performance of moving parts. The numerical method is employed for the analysis of a square texture with different bottom profiles: flat, triangle T1 ...
Nilesh D. Hingawe, Skylab P. Bhore
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The Dynamics of Rotor with Rubbing [PDF]
International Journal of Rotating Machinery, 1998 This paper presents the description of some phenomena associated with dynamic behavior of rotors interacting with stationary components. Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi‐periodic, and chaotic vibrations. The nonlinear calculation techniques are applied to demonstrate the changes of the vibration patterns ...
Jerzy T. Sawicki +2 more
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Applied and Computational Mechanics, 2023 In this work, an coupled end-to-end approach for the optimization of the rotor dynamic behavior of a dual-spool aircraft engine along with fatigue life optimization of squirrel cages (SQC) is presented. A realistic model to simulate the rotor dynamics is
Chatzisavvas I. +2 more
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Thermal Bending of the Rotor Due to Rotor-to-Stator Rub
International Journal of Rotating Machinery, 2000 The rotor thermal bending due to the rotor-to-stator rubbing can lead to one of three types of observed rotor lateral motion: (1) spiral with increasing amplitude, (2) oscillating between rub]no-rub conditions, and (3) asymptotical approach to the rotor ...
Paul Goldman +2 more
doaj +1 more source