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 8 of 8 for “"Oxygen Enrichment"”.
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Flameholding methods for compact hypersonic systems
… the hypermixer geometries alone. Non-premixed oxygen enrichment was tested as an alternative in an axisymmetric Mach 3.5 flowpath. It was observed that oxygen enrichment had significant capability to promote stable scram-mode combustion with low losses in total pressure from sources other than …
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Silicon Oxide Nanoparticles Reveal the Origin of Silicate Grains in Circumstellar Environments
… from being understood. One of the most abundant oxygen bearing species in molecular astronomical regions is SiO. It has been conjectured that silicate formation probably proceeds via the agglomeration of these molecular species; however there are no studies to reveal the microscopic mechanism. We …
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The suitability of coal-oil and other slurries as blast furnace tuyere injectants
… air preheat temperature (typically 1000°c) and oxygen enrichment (up to 26% oxygen content by volume) obtaining on a modern blast furnace.<br/><br/>The results from this rig were used to calibrate a mathematical model of the mixing and combustion processes taking place. A theory of atomisation …
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Nitride semiconductors studied by atom probe tomography and correlative techniques
… studies of TDs were attempted, and evidence for oxygen enrichment near the TD was observed. The dopant level in nitride devices also affects their optoelectronic properties, and the combination of APT and TEM was used to show that Mg dopants were preferentially incorporated into pyramidal …
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Fluidised bed gasification of high-ash South African coals : an experimental and modelling study
… of the coal in the gasifier. It was found that oxygen enrichment of the gasification air from 21% to 36% by means of oxygen addition produces a significant increase in the calorific value of the gas (3.0 MJ/Nm3 to 5.5 MJ/Nm3). This observation has not previously been reported at pilot-plant …
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Oxygen-Enhanced Combustion: Theory and Applications
In the broadest sense, oxygen-enhanced combustion: OEC) refers to the use of oxygen to improve combustion and/or process characteristics. When a stream of oxygen is available, a wide range of flame configurations is possible. This work considers two specific configurations of OEC and is divided …
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Mathematical modelling of the base metal matte converter
… the copper and nickel smelting processes where oxygen contained in air and industrial oxygen is used to oxidise iron in the furnace matte to produce blister copper or the iron free matte suitable for treatment in the downstream processes. A fundamental knowledge of the base metals matte smelting …
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Quantitative measurements of temperature using laser-induced thermal grating spectroscopy in reacting and non-reacting flows
… excitation of OH in the burned gas region of in oxygen enriched CH4/O2/N2 and CH4/air laminar flames was performed at elevated pressure (0.5 MPa) for a range of conditions. Measurements were acquired in oxygen enriched flames to provide an environment in which to demonstrate LITGS thermometry …