Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 236 for “"Lubricant"”.
-
Active lubricant-impregnated surfaces
… the design and testing of actively controlled lubricant-impregnated surfaces for enhanced droplet mobility and manipulation. Droplet manipulation and mobility on non-wetting surfaces is of practical importance for diverse applications ranging from micro-fluidic devices, anti-icing, drop-wise …
-
Wear modeling with sensitivity to lubricant chemistry
… at the design stage for an engine component or a lubricant formulation. The purpose of this research is to develop a theoretical and numerical framework for modeling the formation and evolution of ZDDP antiwear films based on the relevant chemical pathways and physical mechanisms at work. The …
-
Carbon Dioxide-Lubricant Two-Phase Flow Patterns in Small Horizontal Wetted Wall Channels: The Effects of Refrigerant/lubricant Thermophysical Properties
… liquid viscosity, and interfacial tension of lubricant-refrigerant mixtures. For the first time, interfacial tension measurements for refrigerant-lubricant mixtures over the range of concentrations from neat lubricant to pure refrigerant have been measured and published. The research has also …
-
Effect of coolant and lubricant on tool-life
Call number: LD2668 .T4 1965 M67
-
Analysis of boundary lubricant films using Raman spectroscopy
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
-
Enhanced engine efficiency through subsystem lubricant viscosity investigations
… benefits in fuel efficiency, engine emissions, lubricant longevity, and engine durability. Two experimental testing platforms were designed and implemented to empirically study the effects of lubricant formulations on the internal combustion engine's frictional losses. A motored cylinder head …
-
Synthesis and Characterization of Oil Lubricant Antioxidant Degradation Products
Antioxidants are an example of additives added to lubricants as a sacrificial substance, which extend the lifespan by preferentially being oxidized over the lubricant. GasTops Ltd. is interested in predicting the remaining life of a lubricant by monitoring the quantity of antioxidant degradation …
-
Experimental and analytical investigation of refrigerant and lubricant migration
… literature which experimentally measured the lubricant migration within a refrigeration system during cycling or stop/start transients. Therefore, experimental procedures measuring the refrigerant and lubricant migration through the major components of a refrigeration system during stop/start …
-
Distribution of refrigerant and lubricant in automotive air conditioning systems
… air conditioning (A/C) systems, the compressor lubricant is circulated throughout the system with refrigerant. At different oil concentrations, the circulating mixture exhibits different properties, which affects the characteristics of heat transfer, pressure drop and mass retention in each …
-
Vibrating lubricant-infused porous surface for enhanced liquid droplet transport
Lubricant-infused porous surfaces (SLIPS) demonstrate extreme liquid repellency such that a droplet immiscible with the lubricant can roll off at a very small tilt angle < 5°. There have been many applications in using SLIPS to achieve complex fluids handling, anti-fouling, self-cleaning, …
-
Lubricant-derived ash : in-engine sources and opportunities for reduction
… additives in the engine oil accumulates in DPFs. Lubricant-derived ash increases pressure drop and reduces fuel economy. After long time periods, the accumulation of ash may lead to irreversible plugging in DPFs, which necessitates periodic filter removal and cleaning. This thesis examines the …
-
Development and application of a lubricant composition model to study effects of oil transport, vaporization, fuel dilution, and soot contamination on lubricant rheology and engine friction
Engine oil lubricants play a critical role in controlling mechanical friction in internal combustion engines by reducing metal-on-metal contact. This implies the importance of understanding lubricant optimization at the piston ring-cylinder liner interface. Lubricating oil composition varies along …
-
Fabrication and tribology of composite coatings incorporating solid lubricant micro-reservoirs
… of composite coating incorporating solid lubricant reservoirs has been investigated in this study. A new method, termed " microbeading" was devised to create microscopic reservoirs on the surface of sputter-deposited hard coatings. Pin-on-disk tests were used to evaluate the lubricating …
-
Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant
… entitled 'Nanoscale Organic-Inorganic Hybrid Lubricants'. Understanding nanoscale dynamics of polymer and particle upon mixing will be a useful guide to improve its application. Polymer Nanocomposites: Polymer and Particle Dynamics - Polymer nanocomposites containing nanoparticles smaller than …
-
Effects of piston design and lubricant selection on reciprocating engine friction
The interaction between the piston and the liner in a reciprocating engine is of much interest because it affects reliability, noise, and efficiency. This study evaluated various changes to the piston skirt with the specific goal of minimizing friction. An analytical model of the piston, previously …
-
The feasibility of using electrostatic charge condition monitoring for lubricant additive screening
International standards require lubricant formulators to develop additive packages that increase fuel economy, reduce environmental impact and minimise wear over ever increasing service intervals. However, additive behaviour and interactions between additives is not well understood. An absence of …
Page 1 of 12