Search for dissertations about: "Turbofan"
Showing result 16 - 20 of 32 swedish dissertations containing the word Turbofan.
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16. Challenges in aero engine performance modeling
Abstract : There is a continuous drive for ever more efficient aero engines due to environmental as well as economical concerns. As the technology of conventional turbofan engines matures, there is a need for new aero engine concepts as well as incremental improvement of existing technologies. READ MORE
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17. Design of an Experimental Facility for Investi- gating the Flow in a Low Pressure Turbine Exit Structure
Abstract : This report presents the design of a turbine facility for investigating the flow in the EES located at Chalmers University of Technology. The EES is the structure located downstream of the LPT in a jet engine. In this rig, in order to generate realistic inlet boundary conditions for the EES, an LPT stage is located upstream of the EES. READ MORE
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18. Optimization and Model Validation of Transonic Compressors
Abstract : Economical aspects such as reduced specific fuel consumptions and ever growing environmental requirements on emissions and percieved noise levels, are the major drivers in the search for improvement of aircraft engines. For turbofan engines, the global trend is towards higher efficiency which is accomplished by increasing component efficiencies, the bypass ratio and overall pressure ratio while keeping the engine weight low. READ MORE
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19. Experimental investigation of the flow field in an aggressive intermediate turbine duct
Abstract : Intermediate turbine ducts are used for connecting thehigh-pressure turbine to the low-pressure turbine in turbofan engines. In order to meet the demands for more efficient and environmentally friendly jet engines, future intermediate turbine ducts need to have larger radial off-sets without increasing their length. READ MORE
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20. Estimation of Thrust and Health Parameters for Jet Engines
Abstract : An advanced turbofan engine control system would benefit from an accurate thrust and engine performance estimate. Unfortunately, there is to date no reliable in-flight thrust measurement sensors available. READ MORE