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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 32 for “"Optically accessible"”.
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In-Cylinder Soot Oxidation in an Optically Accessible Automotive Diesel Engine
The problematic soot emission of diesel engines is the net result of the competing in-cylinder formation and oxidation processes. Previous studies primarily focused on the soot formation, whereas the oxidation of soot particles remains an unexplored and least studied topic. To bridge this gap, this …
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In-situ plasmon-enhanced characterization of optically accessible ultra-thin film ferroelectric devices
… a scanning plasmonic imaging method using an optically transparent and conductive plasmonic nanoprobe that conducts through a single gold nanoparticle is introduced and verified on MoS2. In chapter 4, Evidence of vacancy migration assisted phase change in FE memories, this study shows the …
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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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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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Design, setup of an optically accessible internal combustion engine for study of gasoline direct injection combustion
… performance. In this study, a single-cylinder optically-accessible engine was built to visualize GDI combustion. The optical engine was originally designed and used as a compression ignition engine for study of diesel combustion, but was extensively modified for GDI. The cylinder head was …
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Methodology For Validating Multi-Dimensional Engine Combustion Models And Fuel Surrogates Using An Optically Accessible Compression Ignition Engine
… validate a fuel surrogate using an optically accessible compression ignition engine. In addition, to provide a means of directly comparing three-dimensional engine combustion CFD predictions to in-</p> <p>cylinder optical measurements, another aim of this work is to model light …
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Single- and Two -Photon Fluorescence for the Detection of Nitric Oxide in an Optically-Accessible Direct -Injection Diesel Engine
Second, a two-photon NO LIF technique was developed and applied to study NO concentrations within the cylinder of the SCORE. This represents the first known application of two-photon NO LIF in an internal-combustion engine. The technique avoids many of the problems associated with in cylinder, …
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Effect Of Cetane Number And Volatility On Autoignition And Combustion Of Alternative Fuels And Their Surrogates
… volume vessel of Ignition Quality Tester (IQT), optically accessible rapid compression machine (RCM), and Partnership for Next Generation of Vehicle (PNGV) single cylinder diesel engine. Experimental data and simulation results indicate that the fuel properties, such as cetane number and …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
<p>An optically accessible domestic-scale swirl-stabilized combustor has been developed to allow for the investigation of combustion characteristics of biomass derived pyrolysis oils in pressure-atomized and air-atomized spray flames. Pine and corn fiber derived pyrolysis oil have been studied, …
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Optical investigation of ethanol and n-heptane dual-fuel partially premixed combution in s reciprocating engine
… of n-heptane and ethanol were investigated in an optically accessible engine representative of light-duty applications. Experimental work involved the application of optical diagnostics such as high-speed imaging of combustion chemiluminescence and soot radiation, spectral measurements and laser …
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Developing a Functional in Vitro Model of the Neuromuscular Interface
… more physiologically relevant, functional, and optically accessible skeletal muscle tissue cultures on top of fibrin hydrogels. Through investigating a series of different sizing parameters, STAMP is shown to effectively align mouse and human skeletal muscle monolayers in vitro and influence the …
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Intersystem crossing in acetylene : a mechanistic study
… crossing) process that distributes the optically accessible bright state over the background of dark states. The potential of the IR-LIF signal as an indirect probe of the triplet states of acetylene has also been demonstrated. Mechanistic insights into the SEELEM detection process …
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Experimental and Theoretical Investigation of Flame Propagation Through Compositionally Stratified Methane -Air Mixtures
… with very slow fuel-air mixture inflows into an optically accessible test chamber and its equivalence ratio distribution in the fresh mixture was measured with both acetone PLIF and Raman spectroscopy. For a flame propagating from stoichiometric to leaner methane-air mixtures, the flame speed was …
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Experimental characterization of condensation behavior for metastable carbon dioxide
… consists of a heated charge tank and an optically accessible instrumented convergent-divergent nozzle. The nozzle was sized such that relevant length and time-scales were similar to those of the flow around a compressor leading edge. Pressure transducers were used to provide static …
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The effects of fuel volatility and operating conditions on sprays from pressure-swirl fuel injectors
… and operating conditions using a firing optically-accessible engine. Planar laser-induced fluorescence and planar Mie scattering imaging experiments were performed to show changes in the spray structure, including its radial and axial penetration. Phase-Doppler particle analysis …
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Development of Lattice-Augmented Fuels for Hybrid Rocket Applications
… extensive series of tests were conducted on an optically accessible slab burner to characterize the regression characteristics of lattice augmented fuels. Lattice-augmented fuels were also demonstrated at a larger scale using a 4-kN nitrous oxide/paraffin hybrid rocket motor. Studies at this …
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Biasing Plasmonic Nanocavities
… explores two novel approaches used to create optically accessible nanoscale junctions. One method is based on graphene electrodes, used to fabricate extended junctions with a metal oxide spacer. These graphene junctions are found to behave as memristive devices, where a solid state redox …
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Combustion, Ionization And Sporadic Pre-Ignition In A Turbocharged Gasoline Direct Injection Engine.
… compared with the burning velocity measured in optically accessible port injected engine in which high speed imaging techniques were used. In addition, it was possible to investigate the impact of the burning velocity on the indicated thermal efficiency and indicated mean effective pressure at …
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Flame-flow interaction during premixed and stratified swirl flame flashback in an annular swirl combustor
… For elevated pressure measurements, an optically accessible elevated pressure chamber was designed and constructed to conduct flashback experiments up to 5 atm. The spatial distribution of the equivalence ratio under non-reacting conditions was investigated using planar laser-induced …
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Linking confined electron spins through coherent light-matter interaction.
… such a network. First, the ability to optically extract a coherent spin state from the quantum dot without perturbing the nuclear environment is explored: nuclear feedback is an issue that has frustrated previous studies into electron spin coherence in these systems. With the novel …
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