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Visar resultat 1 - 5 av 7 avhandlingar som matchar ovanstående sökkriterier.

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

   Författare :Anne Kösters; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; Break-up; OpenFOAM; PaSR; CFD; Diesel; VRFM; VSB2; Spray;

   Sammanfattning : 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. LÄS MER

3. 2. Modeling of Spray Formation and Development in OpenFOAM with Application to Diesel and Alcohol Fuels

   Författare :Andreas Nygren; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; Spray Formation; Spray Modeling; VSB2;

   Sammanfattning : Legislation with reagards to fuel emissions are becoming more stringent. This creates a need for improved engine concepts and fuels. This work is part of an ongoin project to create a concept for a direct injection dual fuel engine, which uses alcohol as main fuel and diesel as a pilot. LÄS MER

4. 3. Simulation of Combustion and Mixture Formation for Gasoline Direct Injection Engine Application

   Författare :Chen Huang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VSB2; Reitz-KHRT; gasoline surrogate; LISA; sensitivity study.; Reitz-Diwakar; Trajectory collision; laminar flame speed; chemical kinetics; TAB; Rosin-Rammler; ignition delay; OpenFOAM; ethanol; O Rourke collision; SMD; hollow cone spray; liquid penetration;

   Sammanfattning : The development and introduction of new engine technologies are primarily motivated by the need to comply with increasingly stringent emissions legislation and to reduce fuel consumption. One of the most important of these new engine technologies is direct gasoline injection, which is considered to be an important and cost-effective measure to meet both targets. LÄS MER

5. 4. MULTICOMPONENT SPRAY-TURBULENCE INTERACTION

   Författare :Vignesh Pandian Muthuramalingam; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasoline diesel blend; CFD; multicomponent fuel sprays; ethanol iso-octane blend; Stochastic Blob and Bubble VSB2 spray model; direct injection engines;

   Sammanfattning : Blended fuels are gaining importance in automotive industry owing to stringent legislations for emissions. It is important to understand the fuel spray formed as a consequence of injecting blended fuels into the engine (for direct injection engines) and also the influence of fuel spray on combustion properties. LÄS MER

7. 5. CFD Modeling of an Alcohol-Diesel Direct-Injection Dual-Liquid-Fuel Engine using OpenFOAM

   Författare :Andreas Nygren; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Renewable Fuels; Dual-Fuel Combustion; CFD; Spray Modeling;

   Sammanfattning : Legislation for heavy duty combustion engines are becoming more stringent. To keep up with the legislation, new engine technology is required. Furthermore, renewable fuels can also be used together with new engine technology to further reduce emissions. LÄS MER