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Fluid Dynamic Foundation of Turbulent Lubrication Theory
A S L E Transactions, 1964A critical examination of Constantinescu's theory of turbulent fluid film lubrication has been undertaken. Several of its anomalies were traced to violations of certain well-established basic phenomena in turbulent shear flows. A new approach, which is free of some of these objections, has been made.
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Methodology of Turbulence Parameter Correction in Water-Lubricated Thrust Bearings
Journal of Fluids Engineering, 2019Oil-lubricated bearings are widely used in high-speed rotating machines such as those found in automotive industries and aerospace. However, environmental issues and risk-averse operations are resulting in the removal of oil and the replacement of all sealed oil bearings with reliable water-lubricated bearings.
Xin Deng +3 more
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Numerical analysis of turbulent lubrication in plain full journal bearings
Industrial Lubrication and Tribology, 2013Purpose – The purpose of this paper is to assess the turbulent thermohydrodynamic (THD) performance characteristics of an axially grooved finite journal bearing for a variety of simulated operating conditions.Design/methodology/approach – The set of governing equations consisting the Navier‐Stokes, turbulent kinetic energy and its dissipation rate ...
Alireza Arab Solghar +1 more
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Turbulence Input Parameters Correction Methodology in Water Lubricated Thrust Bearings
Volume 7B: Structures and Dynamics, 2018Oil-lubricated bearings are widely used in high speed rotating machines such as those found in the aerospace and automotive industries. However, environmental issues and risk-averse operations are resulting in the removal of oil and the replacement of all sealed oil bearings with reliable water-lubricated bearings. Due to the different fluid properties
Xin Deng +4 more
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A Bulk-Flow Theory for Turbulence in Lubricant Films
Journal of Lubrication Technology, 1973The purpose of this study on the turbulent lubricant film is: 1 To give a brief outline of a new theory called bulk-flow theory; 2 To investigate to what extent results of theories based on law of wall and mixing length concept agree with the newly developed theory; 3 To provide a theoretical basis for the design of bearings lubricated by fluids of low
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Turbulent Lubrication—Its Genesis and Role in Modern Design
Journal of Lubrication Technology, 1974Turbulence, a phenomenon well known in fluid flow, was first reported in journal bearings and thrust bearings in 1949. The observations were of higher torques and greater temperature rises than were expected from lower speed data. The transition from laminar behavior occurred at a Reynolds’ number corresponding to the predicted occurrence of Taylor ...
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Coupling analysis of turbulent and mixed lubrication of water-lubricated rubber bearings
Tribology International, 2022Jinsheng Qiao +4 more
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STUDY OF TAYLOR INSTABILITIES AND TURBULENCE IN LUBRICATING FILMS
1977The development of the wavy mode of Taylor vortices in the flow between a rotating inner cylinder and a stationary outer cylinder has been investigated by visual observations using a stroboscopic technique and by inner cylinder torque measurements. Radius ratios of 0.874, 0.911, 0.950 and 0.975 have been tested for the concentric and eccentric cylinder
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
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