Search for dissertations about: "Engineering Acoustics"

Showing result 1 - 5 of 796 swedish dissertations containing the words Engineering Acoustics.

  1. 1. 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

  2. 2. Studies on Diesel sprays under non-reacting and reacting conditions

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Chengjun Du; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diffusion flame; OH radical; ethanol; spray vaporization; soot formation; cavitation; turbulent; OH* chemiluminescence; laser extinction; LAS; Diesel sprays;

    Abstract : Methods for reducing engine-out emissions are urgently needed to mitigate climate change and air pollution. In diesel engines, the quality of fuel-air mixing and the subsequent combustion process strongly affect fuel efficiency and engine-out emissions. READ MORE

  3. 3. Synthetic Paper for Point-of-Care Diagnostics Capillary control, surface modifications, and their applications

    University dissertation from Stockholm, Sweden : KTH Royal Institute of Technology

    Author : Weijin Guo; Wouter van der Wijngaart; Jonas Hansson; Govind V. Kaigala; [2020]
    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; capillary pump; lateral flow test; synthetic paper; OSTE; microarray; point-of-care; surface energy; viscosity; enrofloxacin; plasma separation; protein recovery rate; agglutination; antibody; glass; nitrocellulose; hydrophilic treatment; click chemistry; thiol-yne; thiol-maleimide; biotin-streptavidin; kapillärpump; lateral flödesprov; syntetiskt papper; OSTE; mikroarray; point-of-care; ytenergi; viskositet; enrofloxacin; plasmaseparation; proteinåtervinningshastighet; agglutination; antikropp; glas; nitrocellulosa; hydrofil behandling; klickkemi; tiol-yne; tiol-maleimid; biotin-streptavidin; Biotechnology; Bioteknologi; Chemical Engineering; Kemiteknik; Electrical Engineering; Elektro- och systemteknik; Teknisk mekanik; Engineering Mechanics;

    Abstract : Capillary-based platforms for diagnostics are popular for the point-of-care diagnostics market because of their low cost, easy fabrication, and easy operation. Lateral flow tests are an excellent example of capillary-based platforms for point-of-care diagnostics. READ MORE

  4. 4. Assessment of human swallowing using in-vivo and in-vitro approaches

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Muhammad Waqas; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; in-vitro manometery; In-vitro simulations; In-vivo analysis; microstructure analysis; extensional rheology; dysphagia; Ultrasound viscometry; Bolus Rheology;

    Abstract : Texture modification is the most vital strategy to manage dysphagia: a condition in which food and beverages are difficult to swallow. Typically thickeners in the form of starch or gums are added to the food to increase the viscosity and thereby reduce the speed of bolus flow. READ MORE

  5. 5. Numerical Simulations of Flows around Trains and Buses in Cross Winds

    University dissertation from Gothenburg : Chalmers tekniska högskola

    Author : Hassan Hemida; [2008]
    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; winds; Trains and buses aerodynamics; LES; DES;

    Abstract : When cruising in strong winds, ground vehicles can experience strong aerodynamic forces and moments that may increase drag, reduce their stability, generate noise and induce accidents in the case of strong side winds. However, prevention of the unwanted influences of side winds requires that the flow structures around vehicles are fully understood in both the instantaneous and time-averaged flow. READ MORE