Sökning: "lean modellen"
Visar resultat 6 - 8 av 8 avhandlingar innehållade orden lean modellen.
6. Methods and techniques for precise and accurate in-duct aero-acoustic measurements : Application to the area expansion
Sammanfattning : During the design and commissioning of combustion equipment, combustion associated instabilities are commonly encountered. These thermo-acoustic instabilities can cause undesirable noise, vibrations, local thermal and mechanical stresses in the combustor and are prominent in lean combustion. LÄS MER
7. Empirical studies of auctions of non-distressed residential real estate
Sammanfattning : Real estate auctions have become a popular sales mechanism in Sweden in the past couple of decades when the internet facilitated the marketing of properties for sale. With the possibility to display several exterior and interior pictures of the property rather than the single façade picture style of traditional newspapers advertisements, and a more detailed description of the object, brokers significantly increased the number of potential buyers at the showings of properties for sale. LÄS MER
8. On the Impact of Piston Motion and In-Cylinder Charge Composition on Energy Release, Auto Ignition and Emission Formation in Premixed Charge Internal Combustion Engines
Sammanfattning : The results presented in this thesis can be divided into four areas of investigation: Investigation of the effect of new volume-crank angle relations on engine emissions, power and efficiency; investigation of nitrogen oxides effect on auto ignition and knock in SI engines; investigation of premixed SI and HCCI engine operation with the alternative fuels hydrogen and reformed methanol gas (RMG); software development of a detailed chemical kinetics zonal engine model. Model development of the in-house two-zone chemical kinetic code focused on expansion of the Jacobian matrix to allow simulations of variable in-cylinder charge. LÄS MER