Essays about: "jet engines"

Showing result 16 - 20 of 41 essays containing the words jet engines.

  1. 16. Alloy 718 manufactured by AM Selective Laser Melting : Evaluation of microstructure and weldability

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Valeri Ivanov Petkov; [2018]
    Keywords : Inconel 718; Selective Laser Melting; Additive Manufacturing; Heat Treatment; Weldability;

    Abstract : Inconel 718 is one of the main superalloys that are used in hot structures of jet engines today, because of its excellent mechanical properties at high temperatures and its good weldability. This material has been extensively used and studied in cast and wrought forms during the past decades. READ MORE

  3. 17. Ray Tracing and Spectral Modelling of Excited Hydroxyl Radiation from Cryogenic Flames in Rocket Combustion Chambers

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Jaka Perovšek; [2018]
    Keywords : spectral modelling; excited hydroxyl radiation; OH* radiation; ray tracing; spectroscopy; rocket combustion chambers; rocket engines; hydrogen-oxygen combustion; combustion instabilities;

    Abstract : A visualisation procedure was developed which predicts excited hydroxyl (OH*) radiation from the Computational Fluid Dynamics (CFD) solutions of cryogenic hydrogen-oxygen rocket flames. The model of backward ray tracing through inhomogeneous media with a continuously changing refractive index was implemented. READ MORE

  4. 18. CFD-simulations of urea-waterspray in an after-treatment systemusing Star-CCM+

    University essay from KTH/Mekanik

    Author : Emelie Trigell; [2018]
    Keywords : after-treatment systems; selective catalytic reaction SCR ; AdBlue; multiphase flow; multi-component liquid; Unsteady Reynolds Average Navier Stokes RANS ; wall film formation; solid deposits; efterbehandlingssystem; selektiva katalytiska reaktioner; AdBlue; flerfasstr ¨ommning; flerkomponentvätska; Unsteady Reynolds Average Navier Stokes; väggfilm; avlagringar;

    Abstract : The legislation has forced the vehicle industry to reduce tail-end emissions. The air pollutant nitrogen oxide (NOX) has been shown to have a negative impact on human health and the environment. One of the key technologies to reduce the levels of NOX emitted from a vehicle is by implementing an after-treatment system. READ MORE

  5. 19. The Future of Advanced Bio-Jet Fuel

    University essay from Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

    Author : Amanda Blochel; [2017]
    Keywords : advanced bio-jet fuel; aviation industry; HEFA-SPK; jet fuel; TF-SPK;

    Abstract : The aviation industry is growing rapidly and the carbon dioxide emissions from the industry are following in the same manner. Biofuels made from edible feedstock have had an impact on lowering the emissions but at the same time an impact on increasing food prices. READ MORE

  6. 20. Electric Propulsion in Passenger Jet Airplanes : Requirements to realize all-electric propulsion 

    University essay from KTH/Energiteknik

    Author : Peter Bjarnholt; [2017]
    Keywords : ;

    Abstract : Passenger jet airplane propulsion systems are today dominated by turbo-jet engines that burn fossil fuels. The unsustainability of this is a concern both from an economic and environmental point of view. READ MORE