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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 21 for “"iso-octane"”.
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Equivalence Ratio Gradient Effects on Local Flame Front Topology and Heat Release Rate in Stratified, Iso-Octane/Air Turbulent V-Flames
… strength along its exit plane. Turbulent, iso-octane/air V-flames were anchored in reactant mixtures of varying mean gradients in equivalence ratio (ϕ) and a unique windowing approach was devised in which 3-pentanone tracer planar laser induced fluorescence (PLIF) was used to determine an …
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An approach of compartmentalisation in development of non-isothermal chemical reactor network models for the high speed simulation of iso-octane combustion
… proposed for the simulation of the combustion of iso-octane. The compartmentalisation of a combusting system involves proposing a reactor network based on the flow fields predicted by computational fluid dynamics (CFD). The first step in the development of such a model involves using of a reduced …
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Fuel component effects on hydrocarbon emissions from a spark-ignition engine
… fuel components: MTBE, toluene, m,p-xylene, and iso-octane. For each of these components, new fuel mixtures were blended by increasing the percent volume of that particular component by three different increments. A spark-ignition engine was run at steady-state using these different fuel blends …
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An investigation into the influence of autoignition chemistry and charge cooling under 'Beyond RON' operating conditions on the improved knock resistance of ethanol over iso-octane
… alcohols’ higher knock resistance. Ethanol and iso-octane were chosen as the representative fuels for alcohols and traditional petrols respectively. The study was conducted through a modelling exercise that made use of experimental data to calibrate subsections of the model and validate the …
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Characterization and Chemical Kinetic Analysis of the Ignition of Representative Conventional and Bio-Derived Fuels
… (DMF), 2-methyl furan (2-MF), and furan. The isomer effect on the ignition of alkylated furans is also investigated to understand the general trends between dimethyl and ethyl isomers of cyclic fuel components. Since near term use of biofuels involves blends with fossil fuels, the relative …
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Turbulent flame development in a high-pressure combustion vessel
… a 70 % methane/ 30 % hydrogen mixture, methanol, isooctane and a gasoline (Shell dutch-pura). The mixtures were varied from the lean ignition limit to rich limit up to a maximum equivalence ratio of 2. Further measurements were performed with iso-octane and the effect of r. m. s. turbulent …
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Calibration and implementation of a functional global auto-ignition model
… to stoichiometric air-fuel ratio for n-heptane, iso-octane, 1-hexene, toluene, methanol and a quaternary gasoline surrogate blend of iso-octane, toluene, nheptane and n-hexane. Subsequent to the publication of the model, sets of reaction coefficients for PRF (Primary Reference Fuel) and TSF …
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Experimental and theoretical studies of combustion rates at high pressure
… velocities, initially laminar, were measured for iso-octane - air at equivalence ratios ranging from 0.8 to 1.6 at initial pressures of 0.5 and 1.0 MPa. They were also measured for hydrogen - air mixtures at equivalence ratios of 0.3 to 0.5. Modification of the linear theory of flame instability …
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Detailed Kinetic Modelling of the Oxidation and Combustion of Large Hydrocarbons Using an Automatic Generation of Mechanisms
… main products and intermediates of n-heptane, iso-octane and n-decane oxidation in jet-stirred reactors at a wide range of temperatures and equivalence ratios are generally well reproduced. Sensitivity and reaction flow analyses were performed for shock tube and jet-stirred reactor …
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In cylinder liquid fuel visualization during cold start
… in practice. Fluorescence from indolene and iso-octane doped with acetone and 3-pentanone was used to examine volatility effects. Images were taken on three planes through the cylinder and a number of post-processing techniques were used to analyze the results. The results were analyzed on …
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Investigation of fluid properties at non-ambient conditions
… in this region was found through use of iso-octane and heptadecane as reference fluids. Compressibility factors of these were represented by Tait-style equations. An iterative solution technique was developed to allow the corresponding states method to be applied to diesel fuelsusing …
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Simulation of Turbulent Flames at Conditions Related to IC Engines
… to the role of pressure dependent reaction for iso-octane and involving OH and the in uence of this radical on the fuel consumption rate. The results iv seem to suggest that the overall order of the combustion reaction for iso-octane and gasoline mixture with air is larger than 2 at pressures …
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Catalytic combustion of methane with nanostructured barium hexaaluminate-based materials
… combustion. Reverse microemulsions of water/i30-octane and water/cyclohexane were successfully stabilized with a non-ionic surfactant system consisting of polyethoxylated and linear alcohols. The water/iso-octane system was found to be ideal for the sol-gel mediated synthesis, since it required …
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The HCCI Fuel Number - Measuring and Describing Auto-ignition for HCCI Combustion Engines
… fuels consisting of blends of n-heptane, iso-octane, toluene, and ethanol, which are model surrogates for gasoline. In addition, 21 different full distillate gasoline fuels prepared from refinery feedstocks, some with addition of single components, were tested as well. Five different inlet …
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Investigation of the multi-physics of laser-induced ignition of transportation fuels
… breakdown threshold, facilitating their comparison. The results agree with previous studies and new data sets are generated. </p> <p>Thermomechanical differences between breakdown in non-reactive and reactive mixtures are quantified, isolating the effect of exothermicity on plasma and shock …
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Ignition Quality Tester: an alternative for characterizing the combustion kinetics of low volatility fuels, The
… Experiments were performed for five heptane isomers where accurate mechanisms are available, and the 0-D model ignition time predictions were consistent with the measurements. Similar favorable comparisons were found for iso-octane, another well studied high volatility fuel. Attention then …
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Fundamental studies of premixed combustion
… compared with those reported elsewhere. Comparisons are made with iso-octane-air mixtures and the contrast between fuels lighter and heavier than air is emphasized. Flame instability in laminar flame propagation become more pronounced at higher pressures, especially for lean and stoichiometric …
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Development of particle-scale simulation methods for multiphase flow study
… fields in the particle were found to be anisotropic due to the effect of the gas flow surrounding the particle. The non-uniform distributions of surface temperature indicate that using a constant temperature or heat flux as boundary conditions may cause numerical errors. Sensitivity …
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Studies on the interaction of cholesterol analogues with cholesterol oxidising systems and membrane components
… proportions. A series of spin labels (3-nitroxy octane, Tempo, 25 nitroxy cholestane, and 3 nitroxy cholestane) were incorporated into the sterol phospholipid liposomes and the effect of each analogue on each spin label mobility was observed. In addition the effect of each analogue on water …
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Simulation of turbulent flames relevant to spark-ignition engines
… algebraic closures are also used for comparison. It is shown that the strained flamelet model can predict unconfined, spherically propagating methane-air flames reasonably well. By comparing spherical flame results with planar flames, under identical thermochemical and turbulence conditions, …
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