Sökning: "1D modeling"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden 1D modeling.

  1. 1. 1D engine simulation of a turbocharged SI engine with CFD computation on components

    Författare :Ulrica Renberg; Hans-Erik Ångström; Laszlo Fuchs; Per Birkestad; KTH; []
    Nyckelord :1D modeling; CFD modeling; turbine efficiency; pipe flow; turbocharged engine; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Techniques that can increase the SI- engine efficiency while keeping the emissions very low is to reduce the engine displacement volume combined with a charging system. Advanced systems are needed for an effective boosting of the engine and today 1D engine simulation tools are often used for their optimization. LÄS MER

  3. 2. Empirical combustion modeling in SI engines

    Författare :Fredrik Lindström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spark ignited engines; combustion modeling; knock; 1D simulation; Wiebe; divided exhaust period; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : This licentiate thesis concerns the modeling of spark ignition engine combustion for use in one dimensional simulation tools. Modeling of knock is of particular interest when modeling turbocharged engines since knock usually limits the possible engine output at high load. LÄS MER

  4. 3. On Model Libraries for Thermo-hydraulic Applications

    Författare :Jonas Eborn; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modeling; simulation; Matematik; Automation; Termisk teknik; control systems; nonlinear models; parameter estimation; proces s control; thermo-hydraulic systems; model validation; Thermal engineering; applied thermodynamics; termodynamik; Automatiska system; robotics; control engineering; reglerteknik; robotteknik; Mathematics; object-oriented;

    Sammanfattning : Mathematical modelling and simulation are important tools when dealing with engineering systems that today are becoming increasingly more complex. Tightly integrated production and process optimization are trends that give rise to heterogeneous systems, which are difficult to handle without expertise in several engineering disciplines. LÄS MER

  5. 4. Double Compression-Expansion Engine Concepts : Experimental and simulation study of a split-cycle concept for improved brake efficiency

    Författare :Nhut Lam; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Split-cycle; high efficiency; 1D-modeling; Engine experimetns; heavy-duty engine;

    Sammanfattning : The four-stroke engine was invented by Nikolaus Otto during the second half of the 19th century. Although a lot of technological improvements have been made over the years, the operating principle with four-strokes remains the same. The need and desire of engines with even higher fuel-efficiency is a motivation to study alternative engine concepts. LÄS MER

  7. 5. Protein aggregation: Computational modeling and Monte Carlo algorithm development

    Författare :Sigurdur Jonsson; Beräkningsbiologi och biologisk fysik - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Monte Carlo simulations; protein aggregation; disordered proteins; Fysicumarkivet A:2014:Jonsson;

    Sammanfattning : Although organisms have evolved sophisticated cellular mechanisms for regulating their various protein networks, proteins sometimes start to clump together in an uncontrolled way. The aggregation of proteins has been associated with a range of serious diseases. LÄS MER