Sökning: "chemkin"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet chemkin.

1. 1. LES modelling of spray combustion

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Arvid Åkerblom; [2021]
   Nyckelord :Gas Turbine; CFD; Large Eddy Simulation; Lagrangian Particle Tracking; Chemical Kinetics; Reaction Mechanism; Combustion; OpenFOAM; CHEMKIN; Technology and Engineering;

   Sammanfattning : Computational fluid dynamics is a powerful method for understanding the flow and combustion that occurs inside aircraft engines and will be a key tool in the transition from conventional fossil-based fuel to sustainable alternatives. Because conventional fuels have been more widely researched, an attempt at simulating the combustion of alternative fuels should be preceded by the development of a method that is capable of accurately simulating the combustion of a conventional fuel. LÄS MER

3. 2. Combustion Simulations with reduced mechanisms using hybrid optimization

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

   Författare :Marius Burman Ingeberg; [2018]
   Nyckelord :Optimization; Reduced mechanism; Hybrid optimization; simulated annealing; Genetic algorithm; Physics and Astronomy;

   Sammanfattning : In order to simulate complex combustion systems, the kinetic mechanisms describing the chemical processes have to be reduced. To minimize the error introduced by the reduction, coefficients of the reaction rates included in the mechanisms can be adjusted in ways so that simulations using the reduced mechanism behave like simulations that use detailed mechanisms. LÄS MER

4. 3. Laminar Burning Velocity of Ethanol, Acetaldehyde and Ethanol-Acetaldehyde Flames

   Master-uppsats, Lunds universitet/Fysiska institutionen

   Författare :Mengistu Abebe; [2013]
   Nyckelord :Laminar burning velocity; Temperature; Equivalence ratio; Ethanol and Acetaldehyde; Physics and Astronomy;

   Sammanfattning : The objective of this study is to get new experimental data regarding to the burning velocities of ethanol, acetaldehyde and their mixture which has been performed by the heat flux method. It is known that the heat flux method for determination of laminar burning velocities is an efficient technique since the burning velocity can be determined directly, without applying extrapolations. LÄS MER

5. 4. Optimization of Global Reaction Mechanisms Evaluated on The Sandia Flame D

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Seyedmohammad Mohseni; [2012]
   Nyckelord :CFD; multi-step global reaction mechanism; CFX; CHEMKIN; modeFRONTIER; Laminar Flame Speed; Perfectly Stirred Reactor;

   Sammanfattning : The main goal is to develop and evaluate global reaction mechanisms. The optimization is done using two methods; Laminar Flame Speed and Perfectly Stirred Reactor. LÄS MER

7. 5. Combustion Characteristics of MCV/LCV Fuels - A Numerical Chemical Kinetics Study at Gas Turbine Conditions

   Magister-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Daniel Jarnekrans; [2007]
   Nyckelord :Combustion characteristics; fuels; kinetics; gas turbine conditions; Technology and Engineering;

   Sammanfattning : The purpose of this Master’s Thesis is to develop a model for numerical simulations in order to kinetically characterize different Medium Calorific- Low Calorific Value (MCV-LCV) fuel gas mixtures. Adding fuel components with a very low heating value or inert species affect the stability of the standard gas turbine combustor design. LÄS MER