Search for dissertations about: "flame"

Showing result 1 - 5 of 320 swedish dissertations containing the word flame.

  1. 1. Numerical study of flame dynamics

    University dissertation from Umeå : Fysik

    Author : Arkady Petchenko; Umeå universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; combustion; Direct Numerical Simulation DNS ; turbulence; flame-vortex interaction; flame acceleration; flame-acoustic interaction; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : Modern industrial society is based on combustion with ever increasing standards on the efficiency of burning. One of the main combustion characteristics is the burning rate, which is influenced by intrinsic flame instabilities, external turbulence and flame interaction with walls of combustor and sound waves. READ MORE

  2. 2. Flame Dynamics and Deflagration-to-Detonation Transition

    University dissertation from Stockholm : KTH

    Author : Damir Valiev; KTH.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; flame; premixed; instability; fractal; deflagration; detonation; DDT; simulation; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : Various premixed flame phenomena are studied by means of direct numerical simulations of the complete system of hydrodynamic equations. Rigorous study of flame dynamics is essential for all premixed combustion problems where multidimensional effects cannot be disregarded.The present thesis consists of six parts. READ MORE

  3. 3. Experimental and Numerical Investigations of Flames Stabilized by Swirl Flow and Bluff-body:Flame Structures and Flame Instabilities

    University dissertation from Stockholm : KTH

    Author : Yiheng Tong; Lunds universitet.; Lund University.; [2017-10-16]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Flame structures; Flame instabilities; Blowout limits; Flashback; Swirl Flow; Bluff-body; Chemiluminescence; PIV;

    Abstract : Combustion and its control are essential to our existence on this planet since we knew it. Nowadays, the largest share of the world’s electricity and most of our transportation systems are powered by combustion. In addition, industrial processes also rely heavily upon combustion. READ MORE

  4. 4. Modelling effects of flame development on stationary and oscillating premixed turbulent combustion

    University dissertation from Stockholm : KTH

    Author : Pratap Sathiah; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flame development; Keywords: Premixed turbulent flame; Flame Speed Closure model;

    Abstract : The vast majority of contemporary models of premixed turbulent flames applied to multi-dimensional RANS numerical simulations of combustion in gas turbine engines and aero-engine afterburners focus on fully-developed flames, characterized by fully-developed turbulent diffusivity, thickness, and burning velocity. However, abundant experimental data obtained from statistically stationary premixed flames clearly show that a typical turbulent flame develops as it is convected by mean flow from a stabilization zone. READ MORE

  5. 5. Turbulent burning, flame acceleration, explosion triggering

    University dissertation from Umeå : Fysik

    Author : V'yacheslav Akkerman; Umeå universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Turbulent combustion; flame acceleration; detonation explosion triggering; direct numerical simulations; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : The present thesis considers several important problems of combustion theory, which are closely related to each other: turbulent burning, flame interaction with walls in different geometries, flame acceleration and detonation triggering.The theory of turbulent burning is developed within the renormalization approach. READ MORE