Search for dissertations about: "Exhaust gases"

Showing result 1 - 5 of 56 swedish dissertations containing the words Exhaust gases.

  1. 1. Simulations of compressible flows associatedwith internal combustion engines

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Olle Bodin; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LES; Gas exhange; exhaust port; exhaust manifold; POD; DMD; exhaust; LES; Gasväxling; avgasport; avgasgrenrör; POD; DMD;

    Abstract : Vehicles with internal combustion (IC) engines fueled by hydrocarbon compoundshave been used for more than 100 years for ground transportation.During these years and in particular the last decade, the environmental aspectsof IC engines have become a major political and research topic. READ MORE

  2. 2. Numerical Studies of Flow and AssociatedLosses in the Exhaust Port of a Diesel Engine

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Yue Wang; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Internal Combustion Engine; Exhaust flow; Exhaust Valve; Exhaust Port; Large Eddy Simulation; Valve and Piston Motion; Total Pressure Losses; Energy Losses; Discharge coefficient; Flow Losses; Flow structures; Air Flow Bench; Engine-like Conditions; SRA - Energy; SRA - Energi;

    Abstract : In the last decades, the focus of internal combustion engine development has moved towards more efficient and less pollutant engines. In a Diesel engine, approximately 30-40% of the energy provided by combustion is lost through the exhaust gases. The exhaust gases are hot and therefore rich of energy. READ MORE

  3. 3. On Gas Dynamics of Exhaust Valves

    University dissertation from KTH Royal Institute of Technology

    Author : Marcus Winroth; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Exhaust valve; poppet valve; dynamic valve; engine modeling; discharge coefficient; Avgasventil; rörlig ventil; motorsimulering; utsläppskoefficient; Teknisk mekanik; Engineering Mechanics;

    Abstract : With increasing effects of global warming, efforts are made to make transportationin general more fuel efficient. When it comes to internal combustion engines,the most common way to improve fuel efficiency is through ‘downsizing’. Downsizingmeans that a smaller engine (with lower losses and less weight) performsthe task of a larger engine. READ MORE

  4. 4. High Temperature Corrosion of Cast Irons and Steels

    University dissertation from Chalmers University of Technology

    Author : Frederic Tholence; Chalmers tekniska högskola.; Chalmers University of Technology.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; high temperature corrosion; oxidation; exhaust gases; cast iron; cast steel; SiMo; Ni-resist; ferritic stainless steel; austenitic stainless steel; LCF;

    Abstract : During the last decades, tougher competition and stiffer government policies have forced the automotive industry into a race for safer, cleaner and more fuel-efficient vehicles at low cost. As a consequence, exhaust systems should resist to increased working temperatures. READ MORE

  5. 5. Computational Aeroacoustics Based on Large Eddy Simulation and Acoustic Analogies

    University dissertation from KFS AB

    Author : Mihai Mihaescu; Lunds universitet.; Lund University.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Aeroacoustics; Turbulent Flows; Large Eddy Simulation; Acooustic Analogies; Acoustic Source Terms; Inhomogeneous Wave Equation; Acoustic Boundary Conditions; Mechanical engineering; hydraulics; plasma; Technological sciences; Teknik; fluiddynamik; plasmas; Gaser; fluid dynamics; Gases; LES; vacuum technology; vibration and acoustic engineering; hydraulik; vakuumteknik; vibrationer; akustik;

    Abstract : The thesis presents a numerical method developed by the author and its applications for computing the generated sound by an unsteady flow field and its propagation. The full equations of motion for compressible and unsteady flows describe both flow field and sound generation and propagation. READ MORE