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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 66 for “"combustion products"”.
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Combustion Products from Fires - Influence from ventilation conditions
The production of combustion products is discussed, especially with respect to the influence of ventilation conditions. Results are presented and compared, from different experimental set-ups. Experimental techniques are presented and discussed.
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Characterization of ETBE + Cl and Isooctane + Cl Combustion Products using Synchrotron Photoionization
… spectra and kinetic traces, from which the products and also the intermediates were identified. Relevant reaction dynamics on potential energy surfaces were calculated, reaction enthalpies of each individual step were presented using the CBS-QB3 composite model, and reaction pathways were …
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Modelling the generation of toxic combustion products and its transport in enclosure fires
Combustion products generated in enclosure fires can be transported throughout the enclosure causing death and injury to occupants and a great deal of damage to property and the environment. The ability to estimate the generation and transport of toxic combustion products in real fire scenarios …
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NEW APPROACHES FOR MITIGATING ENVIRONMENTAL CONCERNS ASSOCIATED WITH COAL AND COAL COMBUSTION PRODUCTS
Currently, coal combustion plays an important role in meeting the energy needs of the United States. It is expected that the effective utilization of coal will be crucial for attaining energy independence for the nation in the next 25 to 30 years, if not longer. The United States burns about 20% of …
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Hazards presented by pyrolysis and combustion products during laboratory experiments and real incidents
… majority of fire deaths and injuries and are all products of the chemical and physical processes that occur within fire. This is well known and supported by fire statistics but current fire safety does not directly consider these factors and the hazard they may pose to life. The aim of this thesis …
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Ignition and Combustion of Boron Particles in Hydrogen/oxygen Combustion Products at 30 to 150 Atmospheres
The results of this study demonstrate that boron particle lifetimes at elevated pressures are sufficiently short to make these particles suitable for additives to propellants and that smaller 1-10 $\mu$m sized particles, which have still shorter lifetimes, may be appropriate for addition to …
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Development of Methods for the Determination of Major and Minor Elements and Hydrocarbon Residues in Solid Combustion Products
Methods for the determination of inorganic constituents in coal fly ash by glow discharge spectrometry (GDS) and for the extraction of the organic compounds from coal and ash by supercritical fluid extraction (SFE) at temperatures below 150°C are reviewed. The inorganic elements studied included …
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Optimization of Microwave-Assisted Acid Digestion Method for Determination of Trace Elements in Coal and Coal Fly Ash
… of trace metal elements present in coal and coal combustion products. This method requires use of liquid samples, so all coal and coal combustion products must be digested prior to analysis by ICP. Traditionally an open-air hot-plate acid digestion method published as ASTM D6357-04 was used to …
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Investigation of heat recovery and combustion characteristics in small scale combustion chambers
… the hot components and proposes a regenerative combustion chamber to improve the thermal exchanges. The combustion chamber has been designed in a way that the cold reactants flow in a helicoidal channel which surrounds the inner cylinder where combustion stabilized on a porous medium occurs. …
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A test-cell installation of a gas turbine engine to investigate the performance advantages of low aromatic fuel
… aspects of gas turbine technology and jet fuel combustion performance. This project formed a component of the research activity.ObjectivesThe primary focus of the project was to ascertain the extent to which reducing aromatic content would a ect the performance of a gas turbine. However, since …
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Optical Spectroscopy to Determine Intermediate Combustion Product Radicals in a Hydrocarbon Fueled Rocket Engine Exhaust Plume
… the contributions of intermediate or final combustion products resulting from these hydrocarbon fuels are of great interest. The effect of several diatomic molecular radicals, such as Carbon Monoxide, Molecular Carbon, Methylene Radical, Cyanide or Cyano Radical, Hydroxyl, and Nitric Oxide, …
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Development of a display screen correlation metric for thermal imaging cameras
… various full scale fires. Absorbing gas-phase combustion products greatly affected the ability of the TIC to measure local contrast in temperatures as a function of spatial frequency. A test was developed using a thermal gradient target to relate the voltage ramp output signal recorded in 8 bit …
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Gas Fired Fluidized Beds
… and theoretical, have been made of gas combustion in fluidized beds. A mathematical model has been developed which gives a qualitative estimation of the bed temperature profiles in the axial direction. The concept of Effective Thermal Conductivity is discussed, and bed conductivities are …
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Study of low-temperature-combustion diesel engines as an on-board reformer for intermediate temperature Solid Oxide Fuel Cell vehicles
… Fuel Cell (SOFC), a primary Low-Temperature-Combustion (LTC) technology diesel engine using will bum fuel-rich mixture to provide the high temperature combustion products necessary for SOFC. This study models the ignition properties of the fuel-rich mixture, and then applies the model to …
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A parametric study on the contained burning of solid rocket motor propellant
… bums have been performed in spaces where the combustion products are contained within a sealed chamber. There is currently no accepted method to predict the gas temperature and pressure that results from this process. The primary focus of this study was the prediction of the peak temperature …
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The burning rate of aluminum and magnesium wires in pure oxygen and oxygen-water vapor atmosphere at higher pressures
… of 280°F. In order to study these effects on the combustion reaction, the propagation rate of the burning zone along the wire was measured. It was believed that the participation of the condensed combustion products limited the reaction rate through their effect on the diffusion of oxygen. The …
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Lean Premixed Prevaporised Combustion for Microturbines
… gas emissions, and droplet behaviour in LPP combustion at conditions relevant for microturbines. The first part of the thesis examines the effect of fuel choice using zero- and one-dimensional combustion simulations. The fundamental flame properties of gaseous mixtures of air and diesel, …
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Numerical simulation of two-dimensional Wolfhard-Parker burner
… Virginia Tech to study the effects of dual-mode combustion at high pressures for a two-dimensional Wolfhard-Parker burner. This thesis is the first stage of the theoretical part of the project, and contains a numerical study of laminar coflow diffusion flames stabilized on a confined …
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Model Chromia Surface Chemistry: C<sub>2</sub> Alkyl Fragment Reactions and Probe Molecule Interactions
… surface chlorine adatoms. No surface carbon or combustion products are observed in any reactions indicating that no thermally induced C-C bond cleavage occurs and surface lattice oxygen is not incorporated into surface intermediates. A combination of photoemission and Auger electron …
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Pressure Variation Assisted Fiber Extraction and Development of High Performance Natural Fiber Composites and Nanocomposites
… was also explored. The agricultural byproducts, such as wheat or rice straw, as well as other fast growing crops as miscanthus or kenaf, are comprised of three basic polymers. Just like in wood the polymers are: cellulose, hemicelluloses, and lignin. When subjected to elevated pressures …
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