Sökning: "Darrieus"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet Darrieus.

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

    Författare :Damir Valiev; Börje Johansson; Vladimir Karlin; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flame; premixed; instability; front; Landau; Darrieus; fractal; freely; deflagration; detonation; transition; DDT; modeling; simulation; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : 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. LÄS MER

  3. 2. Fronts and instabilities in laser ablation, organic semiconductors and quantum media

    Författare :Mikhail Modestov; Vitaly Bychkov; Mattias Marklund; Tito Mendonca; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; front; instability; deflagration; fysik; Physics;

    Sammanfattning : The concept of a front plays a decisive role in various elds in physics and beyond. In the present thesis we study key aspects of front dynamics and stability in the context of laser plasmas, organic semiconductors and quantum media. LÄS MER

  4. 3. Experimental Vertical Axis Wind Turbine System

    Författare :Jon Kjellin; Uppsala universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Vertical axis wind turbines may have mechanical advantages compared to conventional horizontal axis wind turbines, which make vertical turbines interesting to study. A 12 kW straight-bladed Darrieus turbine has been designed and constructed by the Division of Electricity at Uppsala University. LÄS MER

  5. 4. Flame Dynamics and Deflagration-to-Detonation Transition

    Författare :Damir Valiev; Börje Johansson; R. J. M. (Rob) Bastiaans; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; flame; premixed; instability; fractal; deflagration; detonation; DDT; simulation; Physics; Fysik;

    Sammanfattning : 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. LÄS MER

  7. 5. Extreme Load Conditions for Wind Powered Direct Drive PM Generators

    Författare :Fredrik Bülow; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : Wind energy is a rapidly growing energy source with vast potential. Vertical axis wind turbines could be more cost-effective than the three bladed horizontal axis turbines that dominate today. LÄS MER