Results 91 to 100 of about 19,469 (232)
Comparison of predicted and experimental thermal performance of angular-contact ball bearings [PDF]
Predicted bearing heat generation and bearing temperature were verified by experimental data for ball bearings over a range of sizes, shaft speeds, and lubricant flow rates.
Parker, R. J.
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Design of the Galileo remote science pointing actuators [PDF]
, 1983 This paper describes the two actuators developed for pointing the remote science instruments from the spinning Galileo spacecraft. Details of the key elements are presented together with their design features and developmental difficulties.
Osborn, F. W.
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Carrier Mapping in Sub‐2nm Node Nanosheet Transistors with Scanning Spreading Resistance Microscopy
Small Methods, EarlyView.Within this work, advancements in scanning spreading resistance microscopy (SSRM) allow charge carrier mapping within 5.5 nm‐thick nanosheet channels. Devices subjected to rapid thermal annealing at 950°C show ∼ 5 nm enhanced phosphorus diffusion, with profiles in close agreement with semi‐atomistic process simulations.
Andrea Pondini +7 more
wiley +1 more source
Simulation Research of Spray Lubrication and Optimization of Nozzle Position in a Complex Gearbox
Jixie chuandong, 2018 The numerical simulation of spray lubrication and improvement of lubricant condition in a complex gearbox are researched. An experimental rig for spray lubrication of a pair of high-speed gears is set up and relevant experiments are carried out firstly ...
Qian Xueling +5 more
doaj
Jixie chuandong, 2022 The numerical simulation of injection lubrication of high-speed wide gears and the improvement of lubrication effect are studied. Based on experimentally verified simulation methods，the oil injection lubrication simulation analysis of the oil-gas two ...
Xiangyu Li +3 more
doaj
Viscous Taylor droplets in axisymmetric and planar tubes: from Bretherton's theory to empirical models [PDF]
, 2018 The aim of this study is to derive accurate models for quantities characterizing the dynamics of droplets of non-vanishing viscosity in capillaries. In particular, we propose models for the uniform-film thickness separating the droplet from the tube ...
Balestra, Gioele +2 more
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Micropatterned Surfaces with Unidirectional Wetting Properties for Liquid Transport
Small Structures, EarlyView.Micropatterned surfaces that guide droplets in a single direction are gaining attention for their role in liquid transport. This review explores how surface designs enable such behavior, from gravity‐driven flow to stimulus‐responsive movement. It also discusses fabrication techniques, design challenges, and emerging strategies to advance directional ...
Elham Lori Zoudani +5 more
wiley +1 more source
Case Studies in Thermal EngineeringGiven the urgent demand for lightweight design and energy conservation in aviation engines, this study investigates the impact of gear pair operating parameters on the heat transfer characteristics of the lubrication system.
Yankun Hou +3 more
doaj +1 more source
Performance of jet- and inner-ring-lubricated 35 millimeter bore ball bearings operating to 2.5 million DN [PDF]
Parametric tests were conducted with a 35 millimeter bore, angular contact ball bearing having a single outer land guided cage. Lubrication was achieved by flowing oil through axial grooves and radial holes machined in the inner ring of the bearing. Test
Schuller, F., T., Signer, H. R.
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Wind Energy, EarlyView.ABSTRACT The installed wind energy capacity increases every year. However, operation and maintenance costs still make up a considerable portion of the levelized costs of electricity. This costs can be greatly reduced by the application of suitable early fault detection methods. The supervisory control and data acquisition system of wind turbines is one
Timo Lichtenstein +2 more
wiley +1 more source