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 atomization"”.
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Evaluation Of Nozzle Geometry On High Pressure Gasoline Direct Injection Spray Atomization
… Gasoline Direct Injection, GDi, injector spray morphology. The study was conducted with the aid of multi-fluid Volume-of-Fluid, Large-Eddy-Simulation, VOF-LES, method. Alternative nozzle geometries, that are the subject of current interest including varying nozzle hole length to diameter …
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Modeling of Multicomponent Fuel Vaporization in Internal Combustion Engines
… A blob model was added to simulate the atomization of the spray under flash boiling conditions with a bubbly-flow in the injector nozzle, and the effect of superheat degree on spray atomization was captured.
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Subpixel Resolution Schemes for Multiphase Flows
… simulations were validated in a high pressure spray atomization experiment.
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Deposition Thickness Modeling and Parameter Identification for Spray Assisted Vacuum Filtration Process in Additive Manufacturing
… model of filter cakes created through a spray assisted vacuum filtration is presented in this paper, to enable the development of advanced thickness controllers. The mass transfer dynamics in the spray atomization and vacuum filtration are studied for the mass of solid particles and mass …
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Development of a 20-moment Polydisperse and Polykinetic Spray Model Coupled With a Surface Density Approach for the Modelling of the Dense and Disperse Liquid Spray Regimes
A so-called Eulerian-Eulerian spray atomization (EESA) modelling framework is proposed in this thesis for the modelling of both the dense and disperse liquid spray regimes. In this approach, a version of the Sigma-Y quasi-multiphase model is used for modelling of the primary atomization of the …
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Dispersion of water sprays in a transverse air jet and the aging of spray nozzles
This thesis explores spray cooling methods used in the manufacturing process of glass fibers. At the onset of the manufacturing process glass fibers are extruded from a pool of molten glass through an array of holes in a heated bushing plate. Before the fibers can be wound onto a spool, the fibers …
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Combustion characteristics of alternative liquid fuels
… acetone, methane and methane/acetone. The spray atomization characteristics of a plain-jet airblast atomizer are investigated using a phase Doppler anemometry (PDA) under non-reacting conditions. The droplet size and velocity distribution of biodiesels are compared to conventional fuels. …
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Integration and Validation of Flow Image Quantification (Flow-IQ) System
… of several particle sizing algorithms for use in spray sizing and average diameter calculation. Several particle sizing algorithms which assume a circular particle profile were tested with DPIV data on spray atomization, including three point Guassian, four point Gaussian, and least squares …
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Air/fuel mixing enhancement and emission reduction through intake port design and various fuel emulsions for diesel combustion
… was also demonstrated. For fuel, although the spray and atomization process could be improved through complicated hardware design, the atomization enhancement due to inherent fuel properties is more attractive due to its low cost and easy implementation. In this study, water as an additive was …
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Development of deflector flat spray nozzle with mixed of water and organic citric acid for emissions trap and cooling in the kitchen hood ventilation system
… main purpose of this study is to introduce mist spray (atomization) to replace the water spray system in the existing kitchen hood. In addition, this study compared the existing (conventional) nozzles in the market such as KSJB model (water spray) and AL75 model (mist spray). Then, this study …
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Numerical simulation and modeling of two-phase flows using the volume-of-fluid method
… and industrial applications such as cavitation, spray atomization, and bubbly flows. As a two-phase system grows in complexity, analytical approximations of fluid behavior and experimental observations become more challenging. To make the detailed study of multiphase flows possible, numerical …
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Impact of alternative jet fuels on gas turbine combustion systems
… this work focuses on the characterization of the spray and the flame dynamics and structure near the lean blowout (LBO) limit, when fuel flow rate is decreased to the point at which the flame is extinguished. To study spray droplet distributions at this condition, a 2D phase Doppler anemometer …
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A study on the characteristics of the flow inside a thermostatic expansion valve
… in air-conditioning system which involves the spray and atomization process of the refrigerant. Most previous studies focused on the macro-features of the expansion valve, such as the refrigerant pressure drop through the valve, the response time of the valve to the change of superheat in the …