Sökning: "Aerospace Engineering"
Visar resultat 1 - 5 av 271 avhandlingar innehållade orden Aerospace Engineering.
1. On the Analysis of Energy Efficient Aircraft Engines
Detta är en avhandling från Gothenburg : Chalmers tekniska högskolaSammanfattning : 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. LÄS MER
2. Multi-Disciplinary Conceptual Design of Future Jet Engine Systems
Detta är en avhandling från Cranfield : Cranfield UniversitySammanfattning : This thesis describes various aspects of the development of a multi-disciplinary aero engine conceptual design tool, TERA2020 (Techno-economic, Environmental and Risk Assessment for 2020), based on an explicit algorithm that considers: engine performance, engine aerodynamic and mechanical design, aircraft design and performance, emissions prediction and environmental impact, engine and airframe noise, and production, maintenance and direct operating costs.As part of this research effort, a newly-derived semi-empirical NOx correlation for modern rich-burn single-annular combustors is proposed. LÄS MER
3. Modeling Diesel spray combustion using a Detailed Chemistry Approach
Detta är en avhandling från Gothenburg : Chalmers tekniska högskolaSammanfattning : The rapid development of computer hardware during the past decade has contributed substantially to advances in almost all branches of science. Computer modeling is being applied to increasingly small physical scales and increasingly large domains, facilitating the generation of advanced phenomenological models and models based on first principles. LÄS MER
4. Component and system design of a mild hybrid 48 V powertrain for a light vehicle
Detta är en avhandling från Gothenburg : Chalmers tekniska högskolaSammanfattning : This thesis presents contributions in three areas relevant for the development of 48 V mild hybrid electric powertrains for cars. The first part comprises methodologies and extensive testing of lithium-ion battery cells in order to establish the electric and thermal performance using equivalent circuit models. LÄS MER
5. Spaceborne Synthetic Aperture Radar for Sea Ice Observations, Concentration and Dynamics
Detta är en avhandling från Gothenburg : Chalmers tekniska högskolaSammanfattning : Spaceborne Synthetic Aperture Radar (SAR) is the primary choice for sea ice monitoring due to its all-weather, day-and-night capability and regular delivery of high resolution images. This thesis presents methods for estimation of sea ice concentration and drift, a multi-sensor study of Baltic Sea ice radar signatures and an interferometric study of landfast sea ice. LÄS MER
