Sökning: "Rotating disc"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden Rotating disc.

  1. 1. Propulsion modelling of a generic submarine propeller

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

    Författare :Gustav Boman; [2023]
    Nyckelord :OpenFOAM; CFD; actuator line model; rotor disk; actuator disk; INSEAN E1619; propeller;

    Sammanfattning : Self propulsion modelling is important in order to accurately simulate ships and submarinesusing Computational Fluid Dynamics (CFD). However, fully resolved simulations of hull andpropeller geometries are computationally heavy and time consuming. As such there is a greatinterest in lower order CFD models of propellers. LÄS MER

  3. 2. Investigating Yttrium Ruthenate Pyrochlore as an Anodic Electrocatalyst in Proton Exchange Membrane Water Electrolysis

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

    Författare :Kneev Sharma; [2023]
    Nyckelord :;

    Sammanfattning : As the energy transition progresses, the demand for green storage solutions is ever-increasing. Hydrogen storage is receiving increased interest and support due to its promising sustainability and flexibility. Proton-exchange, or polymer electrolyte, membrane (PEM) electrolyzers are a key technology supporting hydrogen storage systems. LÄS MER

  4. 3. Influence of Surface Carbon Content on the Wear of Threaded Connections in Rock Drilling Steels

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Andreas Hälsing; [2023]
    Nyckelord :carbon content; wear performance; carburized steel; dry contact interface; threaded connections; drill rods; samples; shot peening; production process; twin-disc wear tester; RPM; operating conditions; wear rate; surface topography; hardness; optical analysis; light optical microscopy; scanning electron microscopy; surface carbon content; microstructural changes; frictional heat; contact pressure; wear mechanisms; plastic deformation; adhesive scratching; material removal; delamination;

    Sammanfattning : This thesis work was conducted at Luleå University of Technology in collaboration with Sandvik Rock Tools. The aim of the work was to determine the influence of carbon content on the wear performance in carburized steel in the dry contact interface of threaded connections between drill rods. LÄS MER

  5. 4. Carbon dioxide separation by disc stack centrifuge at low CO2 concentration

    Master-uppsats, KTH/Kemiteknik

    Författare :David Correa Zapisotski; [2022]
    Nyckelord :CO2; Absorption; CCS; Separation; ”Disc Stack Centrifuge”; CO2; Absorption; CCS; Separering; ”Staplad Disk Centrifug”;

    Sammanfattning : Medan världen undergår en klimatkris, nya sätt för att mildra den har undersökts till det korta och långa loppet. Koldioxid är ett ämne som uppmärksammats då stora mängder av den släpps ut till atmosfären på grund av förbränningsprocesser. LÄS MER

  7. 5. The Development of a Model for Determining the Spatial Resolution of Pulsed-Neutron Sources

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Michael Byrnes; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : This project entails the development of a model for determining the spatial resolution in scanning applications of pulsed-neutron sources, such as at the European Spallation Source (ESS). The development of this model involves the simplification of the problem of representing a pulse neutron scanning across a sample by approximating the pulsed neutron beam as a continuous laser beam scanning across a one dimensional object of known dimensions. LÄS MER