Search for dissertations about: "thesis on mechanical"

Showing result 1 - 5 of 5297 swedish dissertations containing the words thesis on mechanical.

  1. 1. Large-eddy simulation on the effects of fuel injection pressure on gasoline spray characteristics

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Sandip Wadekar; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High pressure fuel-injection; Spray characteristics; LES; GDI engine;

    Abstract : Increasing the injection pressure in gasoline direct injection engines has a substantial potential to reduce emissions while maintaining high efficiency in spark ignition engines. Present gasoline injectors operate at pressures of 20 to 30 MPa. READ MORE

  2. 2. On Contact Mechanisms and Mechanical Transmission Performance

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Lars Maclennan; Lund University.; Lunds universitet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; hydraulics; Mechanical engineering; artificial neural network; experimental study; disc brake; dynamic analysis; shaft; Spur gear;

    Abstract : This thesis consists of four papers, which treat the modelling of a spur gear set and a disc brake, and the interaction between the machine elements. Features of the performance are studied in relation to the initial stated assumptions. READ MORE

  3. 3. On the Analysis of Energy Efficient Aircraft Engines

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Oskar Thulin; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Performance modelling; Aero engine; Turbofan; Aircraft engine; Installed propulsion; Ultra high bypass ratio; Exergy analysis; Engine weight estimate; Variable area fan nozzle; Multiple pivoting flaps; Translating cowls;

    Abstract : Aero engine performance analysis is highly multidimensional using various measures of component performance such as turbomachinery and mechanical efficiencies, and pressure loss coefficients. Using conventional performance analysis, relying on only the laws of thermodynamics, it is possible to understand how the performance parameters affect the component performance, but it is difficult to directly compare the magnitude of various loss sources. READ MORE

  4. 4. The role of piston bowl shape in controlling soot emissions from heavy-duty Diesel engines

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Jan Eismark; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piston bowl; radial mixing zone; soot oxidation; wave-piston; low swirl; enhanced late-cycle combustion; diesel engine;

    Abstract : The role of piston bowl shape in controlling soot emissions from heavy-duty Diesel engines. Diesel combustion is often subject to a trade-off between emissions of soot and nitrogen oxides (NOx). READ MORE

  5. 5. On Stage Acting for development of businesses and ergonomics in woodworking SMEs

    University dissertation from Institutionen för ekonomisk och industriell utveckling

    Author : Johan Karltun; Jörgen Eklund; Gunnela Westlander; Matti Vartiainen; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; organisational change; ergonomics; woodworking; SME; TECHNOLOGY Industrial engineering and economy Manufacturing engineering and work sciences Work sciences and ergonomics; TEKNIKVETENSKAP Industriell teknik och ekonomi Produktion och arbetsvetenskap Arbetsvetenskap och ergonomi;

    Abstract : This thesis reports findings and results from studies of development work and change processes in the secondary woodworking industry. The purpose with the research is to increase the knowledge on how companies can initiate change and to increase their ability to change. READ MORE