Search for dissertations about: "lean limit."

Showing result 1 - 5 of 33 swedish dissertations containing the words lean limit..

  2. 1. Lean Homogeneous combustion for SI-Engines

    Author : Gerben Doornbos; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lean homogeneous combustion; lean limit.; Dual Coil Ignition; ammonia formation catalyst; valve-timing;

    Abstract : This thesis is about the application of lean homogeneous combustion in SI engines using a passive SCR after treatment system. By implementing this concept a decrease in fuel consumption and engine out NOx is expected. The data and results are obtained through engine experiments. READ MORE

  4. 2. A Numerical Study of Reacting Flows Using Finite Rate Chemistry

    Author : Mohammad Irannezhad; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion modeling; Lean blow off; Finite rate chemistry; Inlet boundary condition; Combustion; Lean premixed; Engine configuration; Pulse Detonation Engine; Emissions; URANS; Unsteady phenomena; Flame stabilization; Low Swirl Burner; Large Eddy Simulation; Dynamic flame; Working cycle;

    Abstract : Fossil fuels will remain the main source of energy for mankind in theforeseeable future. Heat released in combustion of fossil fuels is alwaysaccompanied by emission of undesired pollutants. Environmental concernshave led to stringent emission rules for combustion industry speciallyfor reducing the amount of NOx production. READ MORE

  5. 3. Combustion of gasified biomass: : Experimental investigation on laminar flame speed, lean blowoff limit and emission levels

    Author : Nur Farizan Binti Munajat; Torsten Fransson; Catharina Erlich; Jens Klingmann; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biomass gasification; gasified biomass; laminar flame speed; blowoff; emissions;

    Abstract : Biomass is among the primary alternative energy sources that supplements the fossil fuels to meet today’s energy demand. Gasification is an efficient and environmental friendly technology for converting the energy content in the biomass into a combustible gas mixture, which can be used in various applications. READ MORE

  6. 4. Gasoline Engine HCCI Combustion - Extending the high load limit

    Author : Daniel Dahl; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NVO; stratified charge; gasoline engine; high load; knock.; HCCI; stoichiometric; CAI; ringing; SCCI;

    Abstract : There is an increasing global focus on reducing emissions of greenhouse gases.For the automotive industry this means reducing CO2 emissions of the vehiclesmanufactured, which is synonymous with reducing their fuel consumption oradapting them for using renewable fuels. READ MORE

  7. 5. Investigation of a prototype industrial gas turbine combustor using alternative gaseous fuels

    Author : Ivan Sigfrid; Kraftverksteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; Gas Turbine; Laminar flame speed; Stretch; Lean blowout; Emissions;

    Abstract : In this thesis, the effect of alternative gaseous fuels, with high hydrogen content and lower calorific value, on gas turbine combustion was investigated experimentally. The aim of the investigation was to find operational limitations for an experimental burner and to supply data for validation of computational fluid dynamics (CFD). READ MORE