Sökning: "Large Eddy Simulation"

Visar resultat 6 - 10 av 41 uppsatser innehållade orden Large Eddy Simulation.

1. 6. CFD investigation of Plate Channels

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Anton Johannesson; [2022]
   Nyckelord :Plate Heat Exchanger; Turbulence modelling; Generalized k-omega; GEKO; CFD; Computational Fluid Dynamics; Technology and Engineering;

   Sammanfattning : Alfa Laval has a wide product range for plate heat exchangers that can be applied in most industries. The constant development of new and old heat exchangers drive the need for new and efficient methods that can reliably be used in the development process. LÄS MER

3. 7. 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

4. 8. Reaction Wheel Performance Characterisation and Assessment of Electromagnetic Interactions with Magnetic Torquers

   Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Leonie Sander; [2021]
   Nyckelord :Reaction Wheel; Magnetic Torquers; Electromagnetism; Space Mechanism; Attitude Control;

   Sammanfattning : Having an in-depth knowledge on the performance characteristics of space mechanisms in flight operation, with special attention to nominal vs. anomalous performance, is vital for mission success. LÄS MER

5. 9. Model verification and common mode current analysis of grid connected three phase two level converters

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

   Författare :Simon Lindvall; Richard Haraldsson; [2021]
   Nyckelord :active filter; EMC; EMI; converter; common mode; differential mode; shunt active filter; parasitic elements; Technology and Engineering;

   Sammanfattning : In this Master’s thesis an in-depth model of a shunt active filter for high frequency analysis is constructed. The purpose is to enable analysis of higher frequency behavior reaching 1MHz. Using the high frequency model, common mode currents can be simulated. LÄS MER

7. 10. Dimples in corrugated channels to improve efficiency in plate heat exchangers

   Master-uppsats, Lunds universitet/Kemiteknik (CI)

   Författare :Gustav Karlsson; [2020]
   Nyckelord :Dimples; Plate Heat Exchangers; Heat Transfer Enhancement; CFD; Large Eddy Simulation; Reynolds Averaged Navier Stokes Simulation; chemical engineering; kemiteknik; Technology and Engineering;

   Sammanfattning : The development of new heat exchanger patterns is ever changing. Companies are constantly pushing innovation to satisfy costumer needs in terms of thermal efficiency, reliability and serviceability. In this thesis, the implementation of dimples in the corrugated pattern of a plate heat exchanger is investigated to increase the thermal efficiency. LÄS MER