Search for dissertations about: "turbofan engine"

Showing result 21 - 25 of 27 swedish dissertations containing the words turbofan engine.

  2. 21. Estimation of Thrust and Health Parameters for Jet Engines

    Author : Mattias Henriksson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thrust estimation; Kalman filtering; Gas turbine performance estimation; Reduced order observers; Gas path analysis;

    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

  4. 22. On Gas Turbine Conceptual Design

    Author : Konstantinos Kyprianidis; Vishal Sethi; Johan van der Spuy; Mälardalens högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy- and Environmental Engineering; energi- och miljöteknik;

    Abstract : The thesis begins with a review of the evolution of the industry's vision for the aero-engine design of the future. Appropriate research questions are set that can influence how this vision may further evolve in the years to come. READ MORE

  5. 23. Aerodynamic Aspects of Propulsion Integration for Next-generation Commercial Aircraft

    Author : Vinícius Tavares Silva; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Propulsion integration; Ultra-high-bypass-ratio engines; Low-speed testing.; Aerodynamics; Computational Fluid Dynamics; Ultra-short nacelles over-wing nacelle;

    Abstract : Propulsion integration is one of the most challenging aspects of aircraft design. It requires a multidisciplinary approach involving aerodynamics, propulsion, structures, weight, noise, and control systems. READ MORE

  6. 24. Optimization and Model Validation of Transonic Compressors

    Author : Lars R Ellbrant; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; compressor; optimization; design; metamodels; CFD; validation; multiobjective;

    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

  7. 25. Experimental investigation of the flow field in an aggressive intermediate turbine duct

    Author : Lars-Uno Axelsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase-resolved measurements; Intermediate turbine duct; flow visualization; vorticity dynamics; turbulence.; inter-turbine duct; hot-wire anemometry; experiment; 5-hole pressure probe;

    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