Search for dissertations about: "lift-off length"

Showing result 1 - 5 of 14 swedish dissertations containing the words lift-off length.

2. 1. Investigations of Diesel Sprays in Optical Engines - Liquid Fuel Penetration and Lift-Off Length

   Author : Guillaume Lequien; Förbränningsmotorer; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high-speed imaging; liquid penetration; lift-off length; soot; optical engine; Diesel sprays;

   Abstract : Diesel engines are widely used as powertrain solutions for transportation vehicles. Their low fuel consumption and high performance make them attractive, however, their associated pollutant emissions is a major drawback which represent a hazard for public health and the environment. READ MORE

4. 2. Numerical Modelling of Diesel Spray Injection, Turbulence Interaction and Combustion

   Author : Fabian Kärrholm Peng; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Atomization; Spray; Flame; Cavitation; Ignition Delay; Lift-off; Combustion; Computational Fluid Dynamics; Numerical Scheme; TVD; Diesel; Turbulence Model;

   Abstract : This thesis covers two main topics. The first is numerical modelling ofcavitating diesel injector flows, focusing on describing suchflows using asingle-phase cavitation model based on a barotropic equation of statetogetherwith a homogenous equilibrium assumption. READ MORE

5. 3. Spray Processes in Optical Diesel Engines - Air-Entrainement and Emissions

   Author : Clement Chartier; Förbränningsmotorer; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diesel; Combustion; Soot; UHC; Injections; Lift-off length; air-entrainement;

   Abstract : Internal combustion engines have been an important technological field for more than a century. It has had an important impact on society through improved transportation and industrial applications. READ MORE

6. 4. Development of Transient Flamelet Library Based Combustion Models

   Author : Harry Lehtiniemi; Förbränningsfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; auto-ignition; conditional moment closure; Tabulated chemistry; flamelet; spray; non-premixed combustion; Fysicumarkivet A:2012:Lehtiniemi;

   Abstract : Three different methods for Reynolds-averaged Navier-Stokes computational fluid dynamics modeling of non-premixed ignition and combustion using tabulated chemistry have been developed. All methods make use of flamelet libraries, where the flamelet auto-ignition process is parameterized using a progress variable. READ MORE

7. 5. Studies on Diesel sprays under non-reacting and reacting conditions

   Author : Chengjun Du; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diffusion flame; OH radical; ethanol; spray vaporization; soot formation; cavitation; turbulent; OH* chemiluminescence; laser extinction; LAS; Diesel sprays;

   Abstract : Methods for reducing engine-out emissions are urgently needed to mitigate climate change and air pollution. In diesel engines, the quality of fuel-air mixing and the subsequent combustion process strongly affect fuel efficiency and engine-out emissions. READ MORE