Search for dissertations about: "flame propagation"

Showing result 16 - 20 of 45 swedish dissertations containing the words flame propagation.

  2. 16. Turbulent premixed flames in a model gas turbine combustor: fuel sensitivity and flame dynamics

    Author : Francesco Pignatelli; Strömningsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel flexibility; Premixed turbulent combustion; DNS; Optical diagnostic;

    Abstract : The demand for energy security and reduction of greenhouse gas emissions has led to a surge of interest in the development of high-efficiency and low-emission gas turbine engines that can run on alternative low carbon content fuels, such as hydrogen-enriched fuel and syngas. However, the combustion characteristics of these fuels can significantly alter the flame characteristics and operability range of existing combustors. READ MORE

  4. 17. Direct Numerical Simulation and Modelling Study of the Structures and Propagation of Partially Premixed Turbulent Flames

    Author : Vivianne Holmen; Strömningsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Turbulent partially premixed flames are found in common combustion applications, such as the lifted jet flames in diesel engines. There is less theory surrounding the structure and propagation of turbulent partially premixed flames than for classical premixed flames and diffusion flames, especially in regards to modelling. READ MORE

  5. 18. A numerical study of mixing phenomena and reaction front propagation in partially premixed combustion engines

    Author : Christian Ibron; Strömningsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD simulation; förbränning; antändning;

    Abstract : This work treats the modelling of PPC engine combustion through 3D computational fluid dynamics. In order to develop a cost-effective CFD model for the design and performance analysis of PPC engines it is important to first understand the multiple modes of combustion in PPC engines, e.g. READ MORE

  6. 19. Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation

    Author : Vladimir Alekseev; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; hydrogen combustion; laminar burning velocity; ICLAS; temperature dependence; heat flux method; Fysicumarkivet A:2015:Alekseev;

    Abstract : The laminar burning velocity and the flame structure are common targets for combustion studies aimed at detailed kinetic model development. In the present work, fuels relevant to hydrogen combustion were considered. READ MORE

  7. 20. The rotating injector as a tool for exploring DI diesel combustion and emissions formation processes

    Author : Magnus Sjöberg; KTH; []
    Keywords : diesel spray combusion; rotating injector. Air swirl; air fuel-mixing. Soot. NO. CO; flame visualization. Chemking modeling. Soot deposition;

    Abstract : A diesel fuel injector has been modified to allow rotationaround its axis, driven by an electric motor. Injections at upto 6000 rpm from the rotating injector have been investigatedunder the influence of air swirl on one optical research engineand one optically accessible heavy-duty diesel engine. READ MORE