Search for dissertations about: "Aircraft engine"

Showing result 21 - 25 of 62 swedish dissertations containing the words Aircraft engine.

  2. 21. On the Design of Energy Efficient Aero Engines: Some Recent Innovations

    Author : Rickard Avellan; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbofan; aero engine; inter-turbine reheat; emissions; variable cycle; energy efficiency; propeller; NOx; MDO;

    Abstract : In the light of the energy crisis of the 1970s, the old aerospace paradigm of flying higher and faster shifted towards the development of more energy efficient air transport solutions. Today, the aeronautical research and development community is more prone to search for innovative solutions, in particular since the improvement rate of change is decelerating somewhat in terms of energy efficiency, which still is far from any physical limits of aero engine and aircraft design. READ MORE

  4. 22. 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

  5. 23. A Constructive Approach to the Interaction between Risk and Logistics - A Study of Total Offers in the Aerospace Industry

    Author : Jenny Svanberg; Förpackningslogistik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Air transport technology; Constructive Approach; Total Offer; Aircraft Industry; Uncertainty; Risk Analysis; Logistics; Inbound Logistics; Lufttransportteknik;

    Abstract : Total offers have become increasingly common in the aircraft industry during recent years. The total offers bring on challenges as well as possibilities for the providers of engine maintenance. The possibilities, increased profitability and efficiency, are depending on how the organisation copes with the challenges. READ MORE

  6. 24. Numerical investigation of the sensitivity of forced response characteristics of bladed disks to mistuning

    Author : Mikkel Myhre; KTH; []
    Keywords : aircraft engines; gas turbines; bladed disk assemblies; vibrations; high cycle fatigue; forced response; mistuning;

    Abstract : Two state of the art finite element reduction techniquespreviously validated against the direct finite element method,one based on classical modal analysis and another based oncomponent mode synthesis, are applied for efficient mistunedfree vibration and forced response analysis of several bladeddisk geometries. The methods are first applied to two testcases in order to demonstrate the differences in computationalefficiency as well as to validate the methods againstexperimental data. READ MORE

  7. 25. Customer-perceived Value in Business Relationships

    Author : Catarina Bovik; Per Norling; Christian Berggren; Karlstads universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Customer-perceived value; Total service offering; Business-to-business relationship; Commercial aircraft engine maintenance industry; Case study; Business studies; Företagsekonomi; Business Administration; Företagsekonomi;

    Abstract : The content of customer-perceived value has in this study been explored with the aim of providing an understanding of the concept. The evolving service-centered logic for marketing puts an emphasis on value, especially the value perceived and determined by the customer. READ MORE