Search for dissertations about: "flame acceleration"

Found 5 swedish dissertations containing the words flame acceleration.

  1. 1. 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

  2. 2. 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

  3. 3. 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

  4. 4. The role of Landau-Darrieus instability in flame dynamics and deflagration-to-detonation transition

    University dissertation from Stockholm : KTH

    Author : Damir Valiev; KTH.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flame; premixed; instability; front; Landau; Darrieus; fractal; freely; deflagration; detonation; transition; DDT; modeling; simulation; TECHNOLOGY Materials science Other materials science; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig teknisk materialvetenskap;

    Abstract : The role of intrinsic hydrodynamic instability of the premixed flame (known as Landau-Darrieus instability) in various flame phenomena is studied by means of direct numerical simulations of the complete system of hydrodynamic equations. Rigorous study of flame dynamics and effect of Landau-Darrieus instability is essential for all premixed combustion problems where multidimensional effects cannot be disregarded. READ MORE

  5. 5. Dynamics of curved flames in compressible flows

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Oleg Travnikov; Uppsala universitet.; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; fysik; Physics;

    Abstract : Influence of flow compressibility on propagation and stability of premixed laminar flames in gaseous combustible mixtures has been investigated. A linear analysis of the intrinsic hydrodynamical instability of a planar flame front has shown that the instability growth rate is very sensitive to the compressibility effects and can increase significantly even for rather small Mach numbers of the flame generated flow. READ MORE