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.
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Showing 1 to 12 of 12 for “"sealing performance"”.
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Sealing performance assessments of bentonite and bentonite/crushed rock plugs.
… of bentonite and crushed rock are potential sealing materials for high level nuclear waste repositories. The materials have been used to form cap layers to reduce infiltration for mined waste tailings and can also be used to construct clay liners for municipal as well as industrial waste …
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Finite Element Analysis of Super Elastomer Mechanical Behavior and Failure for High Pressure Sealing Applications
Elastomer sealing performance is of critical importance for applications in oil/gas, chemical and aerospace industries where operation conditions are extremely harsh and safety consequences are significant. Such applications often push the material limits and challenge product designs. This study …
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Actuated Poppet Hydrogen Peroxide Reactor
… the silver catalyst to control the reaction. The sealing performance of the valve at working pressures are crucial to the accurate control of the reactor itself. This thesis discusses various design variations of the sealing poppet head and how they can improve performance given various design …
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Design and optimization of micropumps using electrorheological and magnetorheological fluids
… thesis presents two methods: one is a dynamic sealing method to be applied on current micro-scale gear pumps using MR fluids, and the other is a novel design method of micropumps using ER fluids. Using MR fluid with applied magnetic field as a substitute for industrial hydraulic fluids, …
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Passive microfluidic interconnects
… were tested in pairs and arrays. The sealing performance of the first design was found to be highly dependent on the material and surface finish of the features, and the design was found to be largely intolerant to the misalignment inherent in arrays. The second design successfully …
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A multi-scale model for piston ring dynamics, lubrication and oil transport in internal combustion engines
… lower ring tension, the normal force providing sealing between the piston ring and the cylinder liner. However tension reduction can result in additional lubricant consumption. The objective of this thesis is to understand and model the physical mechanisms resulting in flow of oil to the …
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The effect of testing conditions on lost circulation materials' performance in simulated fractures
… the difficulties of testing and monitoring LCM sealing processes in the field, LCM evaluation in the laboratory is often used to prove and assure successful treatment. Investigating LCM behavior and the causation of obtaining different results would expand the reliability of the laboratory …
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Evaluation of recrosslinkable preformed particle gel (RPPG) as a fluid loss control material during drilling operations
… a swelling ratio of eight is used. The HT-RPPG sealing pressure can reach up to 1077 psi/ft when a fracture width of 1.5 mm is used. Hence, Each RPPG achieved an excellent plugging and sealing performance related to its application. Thus, the RPPGs can be an excellent candidate to work as a …
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Large Eddy Simulation of Labyrinth Seals and Rib Shapes for Internal Cooling Passges
… be achieved by enhancement of the heat transfer performance through internal cooling passages. However, the large quantity of flow within this internal cycle inevitably results in mass flow loss, which is a major source of loss in turbomachinery. Therefore labyrinth seals are also investigated in …
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Curved beam based model for piston-ring designs in internal combustion engines
… for developing ring-packs achieving desired performances in terms of sealing and conformability. This study based on straight beam model was already developed but does not consider the lubrication sub-models, the tip gap effects and the characterization of the ring free shape based on any …
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Study of Seal Glass for Solid Oxide Fuel/Electrolyzer Cells
… role in solid oxide fuel/electrolyzer cell performance and durability. A seal glass should have a combination of thermal, chemical, mechanical, and electrical properties in order to seal different cell components and stacks and prevent gas leakage. All the desired properties can …
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Lifetime Prediction and Durability of Elastomeric Seals for Fuel Cell Applications
… or standby, affecting the overall operation and performance of the FC. The elastomeric gaskets used as FC seals are exposed to a range of environmental conditions, and concurrently, subjected to mechanical compression between the bipolar plates forming the cell. The combination of mechanical …