Essays about: "jet engines"

Showing result 21 - 25 of 41 essays containing the words jet engines.

  1. 21. Nonlinear Properties of Acoustic Liners Under High Level Random Excitation in Combination with Single-Tone Excitation

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Julius Fritzell; [2017]
    Keywords : ;

    Abstract : With the increase in air travels the last decades the number of airplanes have increased dramatically. The sound generated by the engines have become a significant problem. The last 60 years a lot has been made trying to reduce the noise levels. Modern jet-engines generates a combination of broadband random noise and tonal components. READ MORE

  3. 22. Motor system design for large UAV

    University essay from Mälardalens högskola/Akademin för innovation, design och teknik

    Author : Daniel Hedlund; [2017]
    Keywords : ;

    Abstract : This thesis investigates the viability of creating a fully electrical motorsystem for a large UAV capa-ble of VTOL. As of today only relatively small UAV's use fully electrical motors as their only sourceof propulsion, larger UAV's have to rely on more traditional combustion or jet engines. READ MORE

  4. 23. Modelling coaxial jets relevat to turbofan jet engines

    University essay from KTH/Mekanik

    Author : Asuka Gabrielle Pietroniro; [2016]
    Keywords : ;

    Abstract : Simulations of subsonic turbulent coaxial hot jets were conducted on two types ofunstructured grids within the framework of STAR-CCM+. The study case is based on atypical airliner turbofan engine model with a core nozzle and a fan nozzle, having a bypassratio of five. READ MORE

  5. 24. Piston bowl combustion simulation - From fuel spray calibration to emissions minimization

    University essay from KTH/Mekanik

    Author : Diego Garcia Pardo; [2016]
    Keywords : ;

    Abstract : The current pollution policies in all European and American countries are forcing the industry to movetowards a more efficient and environmentally friendly engines. On the other hand, customers requiremaintaining the power and fuel consumption. READ MORE

  6. 25. Modelling coaxial jets relevant to turbofan jet engines

    University essay from KTH/Mekanik

    Author : Asuka Gabriele Pietroniro; [2016]
    Keywords : ;

    Abstract : Simulations of subsonic turbulent coaxial hot jets were conducted on two types ofunstructured grids within the framework of STAR-CCM+. The study case is based on atypical airliner turbofan engine model with a core nozzle and a fan nozzle, having a bypassratio of five. READ MORE