Search for dissertations about: "CFD MODELING ON FIRE"

Showing result 1 - 5 of 7 swedish dissertations containing the words CFD MODELING ON FIRE.

  2. 1. Numerical Modeling of Turbulent Combustion and Flame Spread

    Author : Zhenghua Yan; Institutioner vid LTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Technological sciences; Flame Spread; Pyrolysis; Heat Transfer; Radiation; CFD; Turbulent Combustion Modeling; Teknik;

    Abstract : Theoretical models have been developed to address several important aspects of numerical modeling of turbulent combustion and flame spread. The developed models include a pyrolysis model for charring and non-charring solid materials, a fast narrow band radiation property evaluation model (FASTNB) and a turbulence model for buoyant flow and flame. READ MORE

  4. 2. Thermal boundary conditions based on field modeling of fires : Heat transfer calculations in CFD and FE models with special regards to fire exposure represented with adiabatic surface temperatures

    Author : Joakim Sandström; Stephen Welch; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad;

    Abstract : Combining computer fluid dynamic, CFD, models with finite element, FE, models to calculate temperature in fire exposed structures can reduce design temperatures in structures while still obtaining the level of structural fire safety stipulated by society. A better understanding of heat transfer and the concept of adiabatic surface temperatures, AST, the transition of data between models can be simplified and more accurate temperature predictions can be made. READ MORE

  5. 3. Modeling of Diesel Fuel Spray Formation and Combustion in OpenFOAM

    Author : Anne Kösters; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Combustion; Break-up; OpenFOAM; PaSR; CFD; Diesel; VRFM; VSB2; Spray;

    Abstract : The formation, ignition, and combustion of fuel sprays are highly complex processes and the available models have various shortcomings. The development and application of multidimensional CFD models, that describe the different phenomena have rapidly increased through the use of commercial and public software (e.g. READ MORE

  6. 4. Characterization of Gasoline Spray-Wall Interactions

    Author : Ronny Lindgren; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Phase Doppler Anemometry PDA ; gasoline sprays; wall film; modeling; experiments; Computational Fluid Dynamics CFD ; spray-wall interaction;

    Abstract : Interest in spray-wall interactions has intensified recently because of the development of direct injection spark ignition engines. In this type of engine, impingement of the spray on the piston and cylinder walls leads to increased emissions of hydrocarbons and soot. READ MORE

  7. 5. Modeling of Flame Propagation in Spark Ignition Engines

    Author : Johan Wallesten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Developers and manufacturers of gasoline engines are struggling to improve fuel economy and minimize negative environmental effects. Hence, lean burn and direct injection (DI), in particular stratified charge (SC), spark ignition (SI) engines are of special interest. READ MORE