Sökning: "propeller design"

Visar resultat 1 - 5 av 51 uppsatser innehållade orden propeller design.

  1. 1. Användarcentrerad konceptutveckling : Förbättrad användarupplevelse genom välgrundade designändringar i Husqvarnas batteridrivna motorsågar

    Master-uppsats, Linköpings universitet/Produktrealisering

    Författare :Arvid Wittwång; Markus Storck; [2023]
    Nyckelord :husqvarna; motorsåg; produktutveckling; centrifugalkoppling; konceptutveckling; användarcentrerad design; maskinteknik;

    Sammanfattning : Med Husqvarna som fallföretag undersöker det här arbetet de egenskaper som användare önskar se hos en batteridriven motorsåg och hur de uppnås. Detta görs i skenet av Husqvarnas beslut att sätta en centrifugalkoppling på den batteridrivna motorsågen 542i XP, som vid lansering under hösten 2023 blev den första i sitt slag. LÄS MER

  3. 2. Investigation of Variable Speed Technology when Converting Hydropower Kaplan Turbines into Fixed Propeller Turbines

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Johannes Ansved; [2022]
    Nyckelord :hydropower; variable speed; kaplan; turbines; model; simulation;

    Sammanfattning : With an evolving energy system, an increased flexibility is necessary, placing additional demand on hydropower plants. New technology, in particular full size frequency converters (FSFC) and doubly fed induction machines (DFIM), allows hydropower turbines to run at different speeds than originally designed, thus making the turbine more flexible. LÄS MER

  4. 3. Electrical Propulsion System Design of a Blended Wing Body UAV

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Kevin Azad; Felix Fungula; [2022]
    Nyckelord :Aerospace; Aviation; Blended Wing Body; Electrical; Green Raven; Propeller; Propulsion; UAV;

    Sammanfattning : The conventional tube-and-wing aircraft has been around since the 1950s, with little to no innovative progress being made towards redesigning the conventional aircraft. The blended wing body (BWB) shape fuses the wing of the aircraft with the fuselage increasing structural strength while also increasing potential surface area to create lift, making it more efficient than conventional wing shapes. LÄS MER

  5. 4. Investigation of the wing design and endurance of an ultralight electrical aircraft

    Master-uppsats, Lunds universitet/Innovation

    Författare :Vanda Ericson; Jonathan Palmgren; [2022]
    Nyckelord :Aerodynamics; Electrical Aviation; CFD; Endurance; Drag; Technology and Engineering;

    Sammanfattning : The goal of this thesis was to explore the conversion of a propeller driven two-seater combustion airplane to an electrical airplane. Four different wing designs were considered. Two variations of Blackwing Sweden AB’s current Blackwing wing (BW), a longer wing (BW-L) and a shorter wing (BW-S), as well as a new wing with a different airfoil (GW). LÄS MER

  7. 5. Hydroacoustic Modelling of Podded Propulsion System : Underwater Radiated Noise Prediction Using ANSYS

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Martin Persson; [2022]
    Nyckelord :Fluid Mechanics; Computational Aeroacoustics; Frequency Response; Noise and Vibration; Pod; Propulsion System; ANSYS; Reynolds-Averaged Navier-Stokes Equations; Kongsberg Maritime Sweden AB;

    Sammanfattning : Ocean noise pollution is an invisible but growing threat. There are many sources of sound in the ocean but human underwater radiated noise, in particular from shipping is one of the most prominent one. Ocean noise pollution can interfere or sometimes even directly harm marine life. LÄS MER