Sökning: "direction of surface roughness"

Visar resultat 1 - 5 av 19 uppsatser innehållade orden direction of surface roughness.

  1. 1. Inre erosion i tätjord av morän, laboratorieprovning

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Robin Edvinsson; [2024]
    Nyckelord :erosion; tätjord; morän; laboratorieprovning; kontakterosion;

    Sammanfattning : In the spring of 2022, large parts of an approximately 80-year-old earth fill dam in Burvattnet Jämtland were demolished. The demolished parts consisted of a homogeneous dust body of glacial moraine that was founded on soil. LÄS MER

  3. 2. Investigation of charge injection at electrode-dielectric interface relevant for HVDC cables : Simulation of charge injection and transport dynamics in electrical insulation for HVDC cables

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanik

    Författare :Mohammed Mosa; [2023]
    Nyckelord :BCT model; charge injection; space charge density; electric field distribution; Fowler-Nordheim; Richardson-Schottky;

    Sammanfattning : A bipolar charge transport (BCT) model is used to simulate charge injection and transportdynamics inside insulation material which are used in a high voltage direct current (HVDC)cable. Gaining knowledge about space charge density and electric field distribution in theinsulation material enables minimising charge injection at the metal-insulator interface andavoiding unnecessary energy loss. LÄS MER

  4. 3. Investigation on how additive manufacturing with post-processing can be used to realize micronozzles

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Ångström Space Technology Centre (ÅSTC)

    Författare :Alan Bugurcu; [2022]
    Nyckelord :additive manufacturing; micronozzle; micro rocket nozzle; laser-powered powder bed fusion; electropolishing; supersonic micronozzle; supersonic micro rocket nozzle; titanium alloy; titanium-64; Ti-Al6-V4;

    Sammanfattning : This is predominantly a qualitative study on the manufacturing of micronozzles with an additive manufacturing (AM) technique, namely the laser-powered powder bed fusion (PBF-LB).  Manufacturing of micronozzles with standard microelectromechanical system technology often results in 2. LÄS MER

  5. 4. Road Feedback in a Steer-by-Wire System for a Passenger Car : enhancing the feeling of being connected

    Master-uppsats, Linköpings universitet/Fluida och mekatroniska system

    Författare :Alice Finne; Louise Ström; [2022]
    Nyckelord :Steer-by-Wire; SbW; Automotive; Road Feedback; Steering Feel; Electric Power Steering; EPS; Force Feedback;

    Sammanfattning : Road feedback is an essential part of the driving experience, representing a connection betweenthe driver and the vehicle motion. Road feedback in a steer-by-wire system must berecreated and transferred to the driver through a feedback motor mounted on the steeringwheel. LÄS MER

  7. 5. Enhancement of evaluation method of journal bearings’ performance in heavy-duty diesel engines

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Sateesh Nataraj; [2021]
    Nyckelord :Asperity contact pressure; elastohydrodynamic lubrication; friction; flow factors; run-in wear profile; Asperitetskontakttryck; elastohydrodynamik; friktion; flödesfaktorer; slitageprofil efter inkörning;

    Sammanfattning : Journal bearings are being used in various locations of an internal combustion engine. They contribute to a large portion of total engine friction and lowering it means a significant contribution to CO2 reduction. LÄS MER