Sökning: "Combustion instabilities"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Combustion instabilities.

  1. 1. A numerical comparison of the thermoacoustics for different equivalence ratios for n-dodecane using LES

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Björn Jarfors; [2023]
    Nyckelord :Computational Fluid Dynamics; Bluff-body stabilised flames; Large Eddy Simulation; Thermoacoustics; Acoustics; NEUMANN Project; Jet engines; Aero engines; Airplanes; Combustion; Numerics; Technology and Engineering;

    Sammanfattning : Klimatförändringarna påverkar vår värld och det behövs ett mer hållbart samhälle. Flygindustrin är i behov av förändring, men flygmotorer är mycket komplexa och tar tid att utveckla. Termoakustiska instabiliteter har kraften att förstöra en motor, men också att minska miljöpåverkan. LÄS MER

  3. 2. Compressor Surge: Simulation, Modeling and Analysis

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Robin Massiquet; [2022]
    Nyckelord :Turbo compressor; Surge; Simulation; Modelling;

    Sammanfattning : The master thesis subject takes place in the automotive industry and specifically in the internal combustion engine area. The need of improving the efficiency of the engines leads to develop new technologies like turbo compressors. Some of the challenges to overcome are high rotational speed difficulties or extreme load and fatigue in the rotors. LÄS MER

  4. 3. Detection and Identification of Instability and Blow-off/Flashback Precursors in Aeronautical Engines using Deep Learning techniques

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Antony Hermann Guy Cellier; [2020]
    Nyckelord :Thermo-Acoustic Instabilities; precursors; Deep Learning; Speech Recognition.;

    Sammanfattning : The evolution of injection processes toward more fuel efficient and less polluting combustion systems tend to make them more prone to critical events such as Thermo-Acoustic Instabilities, Blow-Off and Flash-Back. Moreover, the addition of Di-Hydrogen as a secondary or as the main fuel is in discussion by aeronautical engines manufacturers. LÄS MER

  5. 4. Green Fuel Simulations

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Daniel Gutiérrez; [2020]
    Nyckelord :Industrial gas turbines; Combustion instabilities; Computational fluid dynamics; Acoustics; COMSOL Multiphysics; Flame transfer function;

    Sammanfattning : Many industries have entered a new global phase which takes the environment in mind. The gas turbine industry is no exception, where the utilization of green fuels is the future to spare the environment from carbon dioxide and NOx emissions. LÄS MER

  7. 5. CFD-Method for 3D Aerodynamic Adjoint Simulations : For External Automotive Aerodynamics

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Marcus Lång; [2019]
    Nyckelord :;

    Sammanfattning : Today’s rules and regulations regarding emissions from combustion vehicles are very strict and the travel range per tank and/or charge, especially for electric vehicles, is a crucial factor which will always be considered by the customers. Hence, automotive manufacturers strive to boost fuel and battery economy. LÄS MER