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 jet"”.
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Flow characteristics and phase interactions of evaporating sprays in gas-solid suspensions
Evaporating spray jets have a wide range of applications in many industrial processes such as fluidized catalytic cracking of crude oil in petroleum refinery, coal gasification, fluidized coking to make synthetic crude oil, and condensed mode gas polymerization. The rapid evaporation of spray jets …
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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 …
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Verification and Validation Study of OpenFOAM on the Generic Prismatic Planing Hull Form
… in particular areas of interest (flat of chine, spray area, etc.), friction coefficient and volume fraction of fluid in areas where the free surface undergoes violent deformations (overturning wave at the chine and in the wake, spray jet development area). Different algorithms for dynamic mesh …
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Effect of Local Bed Hydrodynamics on the Distribution of Liquid in a Fluidized Bed
… into a bed of hot coke particles through spray nozzles, grouped in several banks at different vertical positions. The main objective of this thesis is to determine whether significant improvements in liquid-solid contact could be achieved by optimizing the location of the spray nozzles. In …
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Modeling moderately dense to dilute multiphase reacting flows
… dispersion in sector blast, and reactive spray jet show the method’s validity and practical relevance. In the resolved multiphase limit, the formulation limits to a compressible seven-equation diffused interface method (DIM). Novel extensions are developed for modeling surface tension, …
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Evaporating cross flow spray jets in gas-solid circulating fluidized bed
… flow of solid-gas suspension with liquid spray is found in many industrial applications, including fluidized catalytic cracking in petroleum refinery process, and wet scrubbing process. This dissertation study is aimed to understand the gas-solid-liquid three-phase flow structure, phase …
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Spray visualization and characterization of a multi variable circular orifice (MVCO) injector coupled with a swirl adapter for diesel reformer applications
The fuel spray generated by the injector is of primary importance to mixing and hence, combustion efficiency, due to the extremely short time scale of the combustion event inside an internal combustion engine. In this respect, the aim of the fuel injection system is to atomize the fuel droplets as …
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Concurrent evaporating spray jets in dilute gas-solid pipe flows
Evaporating spray jets into gas-solids suspensions are encountered in many industrial applications. The rapid evaporation of spray jets has significant effects on the gas-solids mixing near the jet nozzle regions, including non-uniform solids concentration dilution, gas/solids temperature …
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The soil ecology of Serratia entomophila, A bacterial pathogen of the New Zealand grass grub, Costelytra zealandica (White)
… by susceptible larvae. Conventional boom spray, jet stream and turf treatment application methods were evaluated for their success in placement of S. entomopbila into pasture. Turf treatment deposited more bacteria into the soil than surface treatments, jet stream and spray. Turf-applied …
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Lean Premixed Prevaporised Combustion for Microturbines
… Because some fuel droplets in a combustor may be sprayed or carried to near the recirculation zone, the simulations use a mixture of pure air and hot combustion products as the oxidiser. The flame structures, evaporation times, and autoignition times in both physical and mixture fraction spaces …
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Modeling of non-uniform hydrodynamics and catalytic reaction in a solids-laden riser
… of industrial riser reactor, the four nozzle spray jets were used, while overlapping of the spray jets is also considered. Finally, in this dissertation, a modeling concept for the reactions in the core and wall regime of the riser reactor is explored. The proposed modeling concept takes into …
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Application of CFD in designing a drug delivery mixing chamber: an experimental and computational study
… of the spacer. In the initial part a series of jet profiles were studied at the inlet, these were in the shape of straight, cone shape and spray jet profiles. It was concluded that the jet with a cone angle of 5° increased the efficiency of the spacer from G.5% to 9.4%. The next stage of …
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A study into the effects of spray and jet characteristics on flash evaporation system
… a comprehensive insight into the atomization of sprays or jets in seawater flashing spray desalination. Alternatively, most of the earlier research focused at the macro scale whereby the general process of flashing and its performance was studied. Little or no information is available on the …