Sökning: "Heat-flux burner"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden Heat-flux burner.

1. 1. Numerical Study of Cellular Instability in Burner Stabilized Adiabatic Laminar Premixed Flames

   Författare :Jiangfei Yu; Strömningsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Detailed Numerical Simulation; Cellular premixed flame; Hydrogen; Oxy-fuel; Heat-flux burner; Hydrodynamic instability; Diffusive-thermal instability; Nonlinear flame dynamics.;

   Sammanfattning : The thesis deals with experiments and numerical simulations of adiabatic laminar premixed flames anchored to a heat-flux burner using different mixtures under various operating conditions. The aim is to obtain a better understanding of cellular instability in heat-flux burner anchored flames. LÄS MER

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

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

   Sammanfattning : 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. LÄS MER

4. 3. Laminar Burning Velocity and Development of a Chemical Kinetic Model for Small Oxygenated Fuels

   Författare :Moah Christensen; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Oxygenated fuels; Kinetic mechanism; Validation; Sensitivity; Laminar burning velocity; Heat flux method; Fysicumarkivet A:2016:Christensen;

   Sammanfattning : The thesis work was performed with the aim of increasing knowledge and understanding of the combustion of oxygenated fuels and intermediates. This was accomplished in two steps: experimental measurements of the laminar burning velocity to expand current databases and development of a reaction mechanism. LÄS MER

5. 4. Limiting conditions for a sustained flame over condensed fuels : Analysis by experiments and stagnant layer theory

   Författare :Frida Vermina Plathner; Avdelningen för Brandteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Critical mass flux; diffusion flame; extinction; sustained ignition; chemical heat of combustion; Convective heat transfer coefficient; external heat flux;

   Sammanfattning : Ignition and extinction characteristics of a material determine whether a fire will be initiated and grow. In fire safety engineering, where modellers deal with a multitude of materials, simplified thresholds are commonly used to determine when ignition and extinction occur. LÄS MER

7. 5. Thermodynamic aspects and heat transfer characteristics of HiTAC furnaces with regenerators

   Författare :Nabil Rafidi; Wlodzimierz Blasiak; John Witton; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; flameless; oxy-fuel; heat-recirculation; gas-recirculation; heat transfer; furnace; radiant-tube; regenerative burner; honeycomb; fixed-bed; Thermal energy engineering; Termisk energiteknik;

   Sammanfattning : Oxygen-diluted Combustion (OdC) technology has evolved from the concept of Excess Enthalpy Combustion and is characterized by reactants of low oxygen concentration and high temperature. Recent advances in this technology have demonstrated significant energy savings, high and uniform thermal field, low pollution, and the possibility for downsizing the equipment for a range of furnace applications. LÄS MER