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 13 of 13 for “"Spray flame"”.
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The Role of Fuel Droplets in Laminar Flame Propagation
… explores the role of fuel droplets in laminar flame propagation. In particular, the effect of fuel droplets on the burning velocity of strained laminar premixed flames was investigated via experimentation and simulation. The twin premixed counterflow configuration was used to measure reference …
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Combustion characteristics of alternative liquid fuels
… properties of biodiesel. The laminar flame speeds of Palm Methyl Esters (PME) and blends of PME with conventional fuels are determined using the jet-wall stagnation flame configuration. The same technique is also used to measure the laminar flame speed of diesel, Jet-A1, n-heptane, …
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Experimental Investigation of Large Scale Aerodynamics on Soot Emissions in Swirling Flows
… (RQL) technology that employs turbulent swirling flames with downstream dilution air. These turbulent flames exhibit spatial and temporal fluctuations not present in laminar flames. This adds a level of complexity to turbulent soot studies that is yet to be fully understood. In this study, a …
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Characterization of 1-butanol electrospray combustion
This study examined the characteristics of electrosprays of 1-butanol that burn in air. Still images and high-speed movies captured with a laser sheet present helped to establish general flame phenomenology and features such as shape, size, and stability of the spray flame. The dependence of the …
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A study of droplet velocity and diameter measurements in a reacting diesel spray produced by a flow-blurring injector
… (UHCs), and soot particles. Thus, understanding spray characteristics is essential for determining how fuel and air mix with each other and subsequently combustion takes place. In this experimental study, Phase Doppler particle analyzer (PDPA) and OH* Chemiluminescence (CL) imaging techniques are …
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Rapid premixing fuel-water injector in burner combustion
… to analyze the influence of mixture formation on flame propagation and combustion characteristics together with the effect of water content on the gas emissions are analyzed. The disadvantages of CPO are high toxic emissions such as NOX and CO while it can cause the reduction on performance of …
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Rapid premixing fuel-water injector in burner combustion
… to analyze the influence of mixture formation on flame propagation and combustion characteristics together with the effect of water content on the gas emissions are analyzed. The disadvantages of CPO are high toxic emissions such as NOX and CO while it can cause the reduction on performance of …
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Simulating Extinction and Blow-off in Kerosene Swirl Spray Flames
… to problematic engine stability phenomena like flame extinction and lean blow-off (LBO) are still not well-understood for conventional spray flames, but alternative fuels provide additional challenges as they have been observed to have increased variability from expected behaviour at conditions …
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Structure and stabilization of cryogenic spray flames
… simulations requires a knowledge of the flame structure, particularly of the region near the fuel injectors. These practical considerations motivate this investigation. As well as discussion on the overall flame shape under subcritical and supercritical conditions, two aspects are given …
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Lean Premixed Prevaporised Combustion for Microturbines
… Thus, this thesis explores the fuel flexibility, flame stability, structures, 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 …
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Autoignition in turbulent two-phase flows
… the numerical investigation of the physics of sprays autoigniting at diesel engine conditions using Direct Numerical Simulations (DNS), and with the modelling of droplet related effects within the Conditional Moment Closure (CMC) method for turbulent non-premixed combustion. The dissertation …
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Modelling of Spray Combustion with Doubly Conditional Moment Closure
Turbulent spray combustion is characterised by a strong coupling of evaporation, mixing and chemical reaction. This leads to a wide spectrum of combustion regimes, where self-propagating premixed flames and diffusion-controlled non-premixed flames may occur simultaneously within the same flame. The …