Results 21 to 30 of about 6,768 (250)

Validation of a Flow Channel to Investigate Velocity Profiles of Friction-Reducing Ship Coatings [PDF]

open access: yesTransNav, 2021
Reducing friction with specialised hull coatings or air lubrication technologies has a potential reducing energy consumption and emissions in shipping.
Jonathan Weisheit   +4 more
doaj   +1 more source

Dynamic characteristics of the gear-rotor system in compressed air energy storage considering friction effects [PDF]

open access: yesMechanical Sciences, 2021
The tooth surface friction effects and the resulting tooth surface contact temperature are important factors for the dynamic characteristics of a gear-rotor system in compressed air energy storage (CAES).
X. Wang   +12 more
doaj   +1 more source

Numerical Study on the Extrapolation Method for Predicting the Full-scale Resistance of a Ship with an Air Lubrication System

open access: yes한국해양공학회지, 2020
Frictional resistance comprises more than 60% of the total resistance for most merchant ships. Active and passive devices have been used to reduce frictional resistance, but the most effective and practical device is an air lubrication system.
Dong-Young Kim   +2 more
doaj   +1 more source

Implementation of Sustainable Vegetable-Oil-Based Minimum Quantity Cooling Lubrication (MQCL) Machining of Titanium Alloy with Coated Tools

open access: yesLubricants, 2022
The lubrication capacity and penetration ability of the minimum quantity cooling lubrication-based strategy is linked with lubrication specific parameters (oil flow rates and air pressure), cutting conditions, and chip formation.
Salman Pervaiz   +5 more
doaj   +1 more source

CFD Investigation into Flow Characteristics of a Special Splash Lubrication in Light Helicopters

open access: yesAerospace, 2022
Lubricating oil flow characteristics are the primary concern in the main reducer of light helicopters. To improve the lubricating performance of the main reducer, a special lubrication system is innovatively constructed by adding two oil-guiding tubes to
He Liu, Yu Dai, Jifu Jia, Xiang Zhu
doaj   +1 more source

Electrohydrodynamic Atomization for Minimum Quantity Lubrication (EHDA-MQL) in End Milling Ti6Al4V Titanium Alloy

open access: yesJournal of Manufacturing and Materials Processing, 2020
Titanium alloy Ti6Al4V is a difficult-to-machine material which is extensively used in the aerospace and medical industries. Machining titanium is associated with a short tool life and low productivity.
Andrea De Bartolomeis, Alborz Shokrani
doaj   +1 more source

Bubble Behavior in Engine Lubricant

open access: yesInternational Journal of Automotive Engineering, 2011
Air bubbles in engine oil cause the serious issues, while high flow rate of the oil is circulated in resent engines lubrication system. In this study, the authors developed the bubble measurement technique based on image processing and analysis.
Yusuke Kimura   +4 more
doaj   +1 more source

Development of an oil-air lubrication system with a piezoelectric nozzle for machine tool spindles.

open access: yesJSME international journal. Ser. 3, Vibration, control engineering, engineering for industry, 1988
Oil-air lubrication is one of the effective lubrication methods for the high-speed spindle of machine tools. However, the oil supply rate to the bearing fluctuates remarkably due to the intermittent oil supply from the oil-air mixing valves. In this study, a new oil-air mixing equipment is developed by applying the piezoelectric nozzle which has been ...
TSUTSUl, Satoshi   +3 more
openaire   +3 more sources

The Role of Ultra‐Thin Passive Films and Organic Adsorbates on Aluminum Chips for a Friction‐Induced Solid‐State Recycling Process

open access: yesAdvanced Engineering Materials, EarlyView.
Despite benefits to storage stability and handleability of aluminum scrap, octadecyl phosphonic acid (ODPA) SAMs reduce the tensile strength of wires produced using friction‐induced recycling. Etching and methyl diphosphonic acid (MDPA) coatings, however, have little effect.
Timothy D. Goller   +3 more
wiley   +1 more source

Influence of Particle Shape and Size in Copper‐Based Low‐Temperature Metallization Paste for Solar Cells

open access: yesAdvanced Engineering Materials, EarlyView.
Particle morphology controls the balance between printability and electrical connectivity in low‐temperature AgCu/Ag metallization pastes. Flake‐shaped AgCu particles form extended low‐resistance contacts, whereas spherical particles favor processability at high metal loading. Fine Ag particles further tune void filling and conductive‐network formation
O. Mhirsi   +3 more
wiley   +1 more source

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