Search for dissertations about: "spray"

Showing result 1 - 5 of 260 swedish dissertations containing the word spray.

  1. 1. Droplet Velocities in a Liquid Spray

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Andreas Cronhjort; [2002]
    Keywords : Liquid spray; diesel spray; droplet velocities; droplet sizes; sprayvisualization; sliced spray; particle image velocimetry; spectrum; cepstrum; cross-correlation; auto-correlation;

    Abstract : A method to look into a dense liquid spray has beenevaluated. The spray was mechanically sliced to remove theobscuring parts of it, thus gaining optical access to theinternal regions and thereby allowing for visualization ofpreviously unavailable parts of the spray. READ MORE

  2. 2. Small Orifices - Diesel Combustion and Spray Investigations

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Pär Bergstrand; [2003]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; multirow nozzles; small orifice diameter; diesel combustion; spray;

    Abstract : Future demands on diesel engines, such as the need to meet stricter emission legislation, improve performance and lower fuel consumption, for lowering transportation cost and carbon dioxide emissions, forces the development of engines to take a major step in the near time. During the years of engine development, all components have been optimised in small steps at a time, but larger steps must now be taken to meet requirements of the future. READ MORE

  3. 3. Numerical Modelling of Diesel Spray Injection and Turbulence Interaction

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Fabian Kärrholm Peng; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Fluid Dynamics; Spray; Cavitation; Cavitation; Turbulence Model; Atomization Turbulence Model; Diesel; Atomization;

    Abstract : It has been established by many authors that numerical simulations ofDiesel sprays, using a Lagrangian description for the liquid phase,are particularly sensitive to the scale of the computational cellscompromising the mesh. There have been many suggestions regardingmeans to reduce the dependency on the mesh by improving the componentsubmodels, but few have addressed the gas phase turbulence modelling. READ MORE

  4. 4. Spray and Spray Combustion Characteristics of Diesel-Ethanol Fuel Blends

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Chengjun Du; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; combustion; spray images; Diesel-ethanol blends;

    Abstract : In Diesel engines, the quality of fuel atomization and fuel-air mixing inside the cylinder have important effects on the combustion process, and therefore strongly related to the fuel efficiency and emission formation. To understand how the injected fuel mixes with air and combustion processes in a Diesel engine, fundamental spray experiments can be carried out in a constant chamber under different engine-like conditions. READ MORE

  5. 5. Modeling of Diesel Fuel Spray Formation and Combustion in OpenFOAM

    University dissertation from Stockholm : Maskinkonstruktion

    Author : Anne Kösters; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; Break-up; OpenFOAM; PaSR; CFD; Diesel; VRFM; VSB2; Spray;

    Abstract : The formation, ignition, and combustion of fuel sprays are highly complex processes and the available models have various shortcomings. The development and application of multidimensional CFD models, that describe the different phenomena have rapidly increased through the use of commercial and public software (e.g. READ MORE