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 20 of 328 for “"bore"”.
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Sympathetic detonation in long bore holes
Includes bibliographical references.
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SOME MAGNETIC PROPERTIES OF BORE CORE SEDIMENTS
… a study of the magnetic effects of drilling on bore cores of sedimentary rocks. Extensive rock and palaeo- magnetic methods were used to investigate such effects in three collections of bore cores from the North Sea and Sellafield, U.K., and Prudhoe Bay, Alaska. It is evident that a drilling …
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Bore polishing of diesel engine cylinder liners
… are two important omissions in the literature on bore polishing, firstly there is no evidence of the successful development of a reliable tribo test device to simulate bore polishing and secondly, the mechanism of bore polishing has not been fully defined. The aims of this study were: 1. To …
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Bore Generation, Propagation, and Impact on Coastal Structures
Generation and propagation of bores due to dam-break, initial mound of water, and solitarywave breaking and the impact on coastal structures are studied in this research by employing three different theoretical approaches. The theoretical models are based on three sets of equations, namely the …
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Development of model for large-bore engine cooling systems
The purpose of this thesis is to present on the development and results of the cooling system logic tree and model developed as part of the Pipeline Research Council International, Inc (PRCI) funded project at the Kansas State National Gas Machinery Laboratory. PRCI noticed that many of the legacy …
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Optimizing power cylinder lubrication on a large bore natural gas engine
… These compressors are powered by 2-stroke, large bore natural gas burning engines. Lowering the operating costs, reducing the emissions, and ensuring that these engines remain compliant with future emission regulations are the drivers for this study. Substantial research has focused on optimizing …
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Modal and Impedance Modeling of a Conical Bore for Control Applications
The research presented in this thesis focuses on the use of feedback control for lowering acoustic levels within launch vehicle payload fairings. Due to the predominance of conical geometries within payload fairings, our work focused on the analytical modeling of conical shrouds using modal and …
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Comparison of packed and wide-bore, open-tubular gas chromatographic columns
Wide-bore, fused-silica capillary columns can be an excellent replacement for packed columns in many cases. They can provide higher surface inertness and thermal stability, as well as higher efficiency or speed of analysis. Wide-bore, open-tubular (WBOT) columns with thick films have higher sample …
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Development of a Phenomenological Combustion Model for Large Bore Dual Fuel Engines
L'abstract è presente nell'allegato / the abstract is in the attachment
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An investigation into the mechanisms of cone bore growth in railroad bearings
The mechanisms of cone bore growth in railroad bearings have been investigated. Systematic studies of (1) stress-induced transformation of retained austenite to martensite, (2) thermal-induced transformation of retained austenite to bainite, and (3) low temperature creep have been conducted. Both …
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Air-oil mist lubrication of small bore ball bearings at high speeds
Deep groove and angular con tact 25 and 30 mm bore ball bearings were tested to high speeds using air-oil mist lubrication. Test conditions included cooling air flow rates of 1.5, 3.0, and 6.0 scfm (0.05, 0.10, and 0.20 kg/min), thrust loads of 50, 75, and 100 lb (222, 334, and 445 N), and a …
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Computational fluid dynamics modeling of a large bore two-stroke natural gas engine
… United States alone, there are over 8,000 large bore (bore >30 cm) slow speed (speed < 500 rpm) natural gas engines in use. The most common configuration is a two-stroke cycle with direct injection of natural gas into the cylinder. The specific engine modeled in this study, the GMV Cooper …
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Detecting Breaking Waves and Measuring Bore Speeds in Optical Surf Zone Imagery using Machine Learning
… along a kilometer-scale beach in Duck, NC. Bore speeds are estimated from the breaking-wave detections and are compared with theoretical models using surveyed bathymetry. Bathymetry inversion from the derived bore speeds is then explored, revealing low but systematic bias within the surf …
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A Small-Radius Rotating-Coil Measurement System for Field Characterization of Small-Bore-Diameter Magnets
L'abstract è presente nell'allegato / the abstract is in the attachment
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PROSPECTIVE HEAD MOVEMENT CORRECTION FOR HIGH-RESOLUTION MRI USING AN IN-BORE OPTICAL TRACKING SYSTEM
… of head motion during data acquisition, an in-bore optical motion tracking system is proposed. The system comprises one or two MR compatible infrared cameras that are fixed on a holder right above and in front of the head coil. The resulting close proximity of the cameras to the object allows …
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The design and testing of large bore hose used for the offshore transportation of hydrocarbons
For many years the physical design of offshore hose has relied on subjective opinion and experience only occasionally populated by factual design criteria. Similarly the testing of the same could only be described as a faint shadow of reality. It was against this background and an increasing …
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Low-Temperature Combustion in a Small-Bore High-Speed Direct Injection Optically Accessible Diesel Engine
Experiments with renewable bio-diesel fuels were conducted, too. Less luminous flame was observed for bio-diesel fuel blends showing a lower soot formation rate. The flame luminosity decreased faster for bio-diesel fuel indicating a faster soot oxidation rate. The increased NOx emissions of …
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Oxidation catalyst degradation in the exhaust stream of a large bore 2-stroke natural gas engine
… exhaust stream of a Copper-Bessemer GMVH12 large bore 2-stroke natural gas engine between one and two months at a time. The catalyst was periodically removed and returned to the laboratory for emissions and material testing. Emissions testing was completed by diverting exhaust gas from a Cummins …
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Mixing and Combustion Studies in an Optically-Accessible Small-Bore High-Speed Direct -Injection Diesel Engine
An optically-accessible single cylinder small-bore HSDI diesel engine equipped with a Bosch common-rail injection system was used to study the effects of injection strategies on mixing and combustion. A single main and multiple injection strategy were investigated in this study, varying injection …
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