Sökning: "turbocharging"

Visar resultat 11 - 15 av 17 avhandlingar innehållade ordet turbocharging.

  1. 11. Large Eddy Simulations of Complex Flows in IC-Engine's Exhaust Manifold and Turbine

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Johan Fjällman; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Large Eddy Simulations; Reynolds Averaged Navier-Stokes; Turbocharger; Turbine; Curved Pipes; Pulsatile Flow; Proper Orthogonal Decomposition; Large Eddy Simulations; Reynolds Averaged Navier-Stokes; Turboladdare; Turbin; Rörkrök; Pulserande Flöde; Proper Orthogonal Decomposition; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : The thesis deals with the flow in pipe bends and radial turbines geometries that are commonly found in an Internal Combustion Engine (ICE). The development phase of internal combustion engines relies more and more on simulations as an important complement to experiments. LÄS MER

  2. 12. Aerothermodynamics and exergy analysis in turbocharger radial turbine

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Shyang Maw Lim; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pulsatile exhaust flow; turbine; turbocharger; Detached Eddy Simulation; heat transfer; exergy; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : Coupling of turbomachine to reciprocating automotive engine in turbocharging leads to complex fluid flow and thermal characteristics in the turbine. Some undesirable characteristics include heat transfer, flow pulsation and secondary flow due to the complex geometry of the upstream exhaust manifold. LÄS MER

  3. 13. Diluted Operation of a Heavy-Duty Natural-gas Engine

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Mehrzad Kaiadi; Lunds universitet.; Lund University.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Fuel economy and emissions are the two central parameters in heavy duty engines; most of the existing heavy duty engines are run with diesel. The overall efficiency of diesel engines is good however they suffer from high levels of emissions mainly NOX and soot. LÄS MER

  4. 14. Compressor Modeling for Control of Automotive Two Stage Turbochargers

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Oskar Leufvén; Linköpings universitet.; Linköpings universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : There is a demand for increasing efficiency of automotive engines, and one way to achieve this is through downsizing and turbocharging. In the design compromises are made, for example the maximum power of the engine determines the size of the compressor, but since the compressor mass flow range is limited, this affects the torque for low engine speeds. LÄS MER

  5. 15. Modeling for control of centrifugal compressors

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Oskar Leufvén; Linköpings universitet.; Linköpings universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Downsizing and turbocharging of engines provide a way to meet increasing demands for efficiency and performance in the automotive industry. An engine design is a result of compromises, e.g. the selection of charging system, and the trend is to reduce these compromises by increasing system complexity. LÄS MER