Search for dissertations about: "pdf"

Showing result 1 - 5 of 30711 swedish dissertations containing the word pdf.

  1. 1. Stochastic Reactor Models for Engine Simulations

    University dissertation from Division of Combustion Physics, Department of Physics, Lund University

    Author : Martin Tunér; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SRM; Stochastic Reactor Model; Engine Simulation; Chemical kinetics; HCCI; Direct injection; Combustion; NVO; Modeling; PDF;

    Abstract : The aim of the thesis work is the further development of practical engine simulation tools based on Stochastic Reactor Models, SRMs. Novel and efficient implementations were made of a variety of SRMs adapted to different engine types. The models in question are the HCCI-SRM, the TwoZone SI-SRM and the DI-SRM. READ MORE

  2. 2. Mathematical Modeling of Turbulent Reactive Flows

    University dissertation from Chalmers University of Technology

    Author : Mikael Mortensen; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; computational fluid dynamics; CFD; turbulent mixing; chemical reactions; conditional moment closure; CMC; presumed mapping function; PMF; probability density function; PDF;

    Abstract : The purpose of this thesis has been to study and develop mathematical models of non-premixed turbulent reacting flows. The models developed can be used both by the chemical process industry and for turbulent combustion applications. Furthermore, the models are general and not developed for any specific chemical or mechanical system. READ MORE

  3. 3. Towards understanding breakage and flow in sublevel caving (SLC) Development of new measurement techniques and results from full-scale tests

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Matthias Wimmer; Luleå tekniska universitet.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Abstract : Blast function, fragmentation and gravity flow are core elements for sublevel caving (SLC). For the ore recovery to be as high and the waste rock dilution as low as possible all three elements have to work as planned. READ MORE

  4. 4. Large Eddy Simulation of Turbulent Swirling Flows in Combustor Related Geometries

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Yajing Wu; Lunds universitet.; Lund University.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Swirling flow; swirler; vortex breakdown; precessing vortex core PVC ; large eddy simulation LES .;

    Abstract : Popular Abstract in English The concern about pollutant emissions from combustion devices has stimulated the development of modern combustion devices. As one of the major power generation machines, modern gas turbine engine has been designed to run at fuel-lean and premixed mode of combustion in which the combustion temperature is moderate so that NOx emission is low. READ MORE

  5. 5. Numerical Modelling of Fuel Injection and Stratified Turbulent Combustion in a Direct-Injection Spark-Ignition Engine Using an Open Source Code

    University dissertation from Chalmers University of Technology

    Author : Chen Huang; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemical mechanism; ignition delay; laminar flame speed; hollow-cone spray; KHRT; liquid penetration; SMD; gasoline surrogate; premixed stratified turbulent combustion; Flame Speed Closure FSC ; presumed PDF; Spray-Guided Gasoline Direct Injection engine; modelling; CFD; OpenFOAM;

    Abstract : Stringent regulations on the emission of pollutants, especially carbon dioxide (CO2), necessitate the development of advanced combustion technologies. Gasoline direct injection (GDI) into the combustion chamber of a Spark Ignition (SI) engine is a combustion strategy that is widely recognized as having the potential to improve fuel efficiency of internal combustion engines for passenger cars. READ MORE