Search for dissertations about: "laminar burning velocity"

Showing result 11 - 15 of 15 swedish dissertations containing the words laminar burning velocity.

  2. 11. Automatic Analysis and Reduction of Reaction Mechanisms for Complex Fuel Combustion

    Author : Daniel Nilsson; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; hydraulik; Complex fuel combustion; Reduced kinetic models; skeletal mechanism; QSSA; hydraulics; Mechanical engineering; vacuum technology; Maskinteknik; vibration and acoustic engineering; vakuumteknik; vibrationer; akustik; Physics; Fysik; Chemistry; Kemi; Fysicumarkivet A:2001:Nilsson;

    Abstract : This work concentrates on automatic procedures for simplifying chemical models for realistic fuels using skeletal mechanism construction and Quasi Steady-State Approximation (QSSA) applied to detailed reaction mechanisms. To automate the selection of species for removal or approximation, different indices for species ranking have thus been proposed. READ MORE

  4. 12. RANS Simulations of Interaction between Premixed Flame and Turbulence using OpenFOAM Library

    Author : Ehsan Yasari; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modeling; Turbulent flow; FSC model; Premixed turbulent combustion; OpenFOAM; Simulation; Countergradient turbulent transport; TFC model;

    Abstract : Unsteady multi-dimensional numerical simulation of turbulent flames is a widely recognized tool for research and development of future internal combustion engines capable of satisfying stringent requirements for ultra-low emission and highly efficient energy conversion. To attain success, such simulations need, in particular, elaborated CFD software and predictive models of turbulent burning. READ MORE

  5. 13. Modeling of Flame Propagation in Spark Ignition Engines

    Author : Johan Wallesten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Developers and manufacturers of gasoline engines are struggling to improve fuel economy and minimize negative environmental effects. Hence, lean burn and direct injection (DI), in particular stratified charge (SC), spark ignition (SI) engines are of special interest. READ MORE

  6. 14. Identification of principal chemical subsets of biofuel combustion : Ants walking in renewable fire

    Author : Christoffer Pichler; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Reduced kinetic models; Biofuel; n-Heptane; Alcohols; Ant-Colony Reduction; Combustion chemistry; Fysicumarkivet A:2020:Pichler;

    Abstract : The work in this thesis was carried out to highlight important chemical pathways in skeletal mechanisms for the three smallest alcohol fuels (methanol, ethanol and npropanol), two representative fuel alkanes n-heptane and n-decane, and finally the biodiesel surrogates, methyl-decanoate, methyl-5-decenoate, and methyl-9-decenoate. This aim was set up to further the efforts of creating Computational Fluid Dynamics (CFD) suitable mechanisms, which in turn can be used by the industry to improve, for example, engines or gas turbines, or by academia to further understand turbulent combustion. READ MORE

  7. 15. Laser-Based Investigations of Combustion Phenomena in Gas Turbine Related Burners

    Author : Arman Subash; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Combustion; Gas turbine; Chemiluminescence; laser-based techniques; LIF; PIV; DLE; TARS; CH4; H2; OH; CH20; Equivalence ratio; flame stabilization; LBO; Flashback; RPL; Fysicumarkivet A:2018:Subash;

    Abstract : Experiments were performed on various combustion devices to investigate the flames employing different optical measurement techniques under atmospheric pressure conditions. Non-intrusive laser-based techniques provided in-situ information concerning different parameters of the combustion process, with a high degree of temporal and spatial resolution. READ MORE