Sökning: "Motors and propulsion systems"

Visar resultat 6 - 10 av 39 avhandlingar innehållade orden Motors and propulsion systems.

1. 6. Numerical Modelling of Soot Formation in Turbulent Non-Premixed Flames

   Författare :Olga Roditcheva; Strömningsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motorer; Motors and propulsion systems; Teknik; Technological sciences; oxidation of soot.; soot; polutant formation; flamelet approach; Combustion; turbulence; framdrivningssystem; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik;

   Sammanfattning : This thesis describes an extended flamelet approach for modelling of soot formation in turbulent hydrocarbons diffusion flames. Detailed chemical kinetic mechanisms are used to compute species concentrations, temperature, density and soot formation rates as functions of flamelet coordinates in the space of mixture fraction and scalar dissipation rate. LÄS MER

3. 7. Combustion Studies of Soot and Fuel Based on Use of Laser Diagnostics

   Författare :Boman Axelsson; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser Diagnostics; Laser Induced Fluorescence; Soot; Physics; Fysik; Laser technology; Motors and propulsion systems; Laserteknik; Laser-Induced Incandescence; Motorer; framdrivningssystem; Fysicumarkivet A:2002:Axelsson;

   Sammanfattning : In the work described in the present thesis, laser techniques for combustion engine diagnostics were developed and applied. The main techniques were laser-induced incandescence (LII) and laser-induced fluorescence (LIF), used for both flame and engine diagnostics. LÄS MER

4. 8. Thermometry Using Laser-Induced Emission from Thermographic Phosphors: Development and Applications in Combustion

   Författare :Alaa Omrane; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; framdrivningssystem; Motorer; Motors and propulsion systems; Laser technology; Laserteknik; Teknik; Technological sciences; Physics; Pyrolysis; Flame spread; Droplet; Engine; Imaging; Temperature; Thermographic phosphors; Combustion; Fysik; Laser diagnostics;

   Sammanfattning : Temperature is a fundamental thermodynamic parameter used to describe physical, chemical and biological processes. Much effort is made to measure temperature accurately in a wide variety of applications, making temperature one of the most extensively measured parameters. LÄS MER

5. 9. Evaporative Cycles - in Theori and in Practise

   Författare :Per M Rosén; Kraftverksteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motors and propulsion systems; Trigeneration; Combustion Engines; Gas Turbines; CHAT; HAM; HAT; Evaporative Cycles; EvGT; Motorer; framdrivningssystem; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik;

   Sammanfattning : The thesis is based on applied research, rather closed to industrial development. The developed simulation model, for pre-design of evaporative gas turbine cycles, has been validated in a 600 kW pilot plant and in rebuilt turbo-charged diesel engines. LÄS MER

7. 10. HCCI Combustion - Engine Operation and Emission Characteristics

   Författare :Magnus Christensen; Förbränningsmotorer; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motorer; framdrivningssystem; Motors and propulsion systems; efficiency; emissions; combustion; HCCI; engine;

   Sammanfattning : The potential and limitations of the Homogeneous Charge Compression Ignition (HCCI) engine concept has been experimentally investigated. The operation range, in terms of usable air/fuel ratio and engine load, and the emission characteristics have been studied. An 1. LÄS MER