Sökning: "Geometric to numerical model"

Visar resultat 1 - 5 av 25 uppsatser innehållade orden Geometric to numerical model.

  1. 1. Modelling Gas Flow Behaviour in Gas Atomizer

    Master-uppsats, KTH/Materialvetenskap

    Författare :Aravind Senan Vasanthasenan Reji; [2022]
    Nyckelord :Gas atomization; Nozzle; Velocity; Static pressure; Discrete phase model; Gasatomisering; Munstycke; Hastighet; Statiskt tryck; Diskret fasmodell;

    Sammanfattning : Gas atomization is regarded as a reliable method for creating high-quality metal powders from molten metal. The liquid metal is fed into the chamber as a free-falling stream through a nozzle, where it is impinged by high-velocity gas jets, causing degeneration and production of metal droplets, which solidify to create metal powders. LÄS MER

  3. 2. An input-sample method for zonotopic obstacle avoidance with discrete-time control barrier functions

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Xiong Xiong; [2022]
    Nyckelord :Control barrier functions; RRT; Discrete-time Control barrier function; Input sample; Kontrollbarriärfunktion; RRT; diskret tid Kontrollbarriärfunktion; inmatningsprov;

    Sammanfattning : In this thesis, we consider the motion planning problem for an autonomous vehicle in an obstacle-cluttered environment approximated by zonotopes, and we propose an input sampling algorithm leveraging discrete-time control barrier function conditions (DCBF). Specifically, an optimization-based control barrier function that takes into account the geometric shapes of the vehicle and obstacles is constructed and verified. LÄS MER

  4. 3. Grey Box Model of Leakage In Radial Piston Hydraulic Motors

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

    Författare :Niklas Ydebäck; [2021]
    Nyckelord :Grey box; modeling; Radial piston; Bosch Rexroth; parameter estimation;

    Sammanfattning : This report covers the work and results of the thesis project in Mechanical Engineering from Luleå university of technology performed by Niklas Ydebäck. The objective of the thesis project is to research if it is possible, with general principles of fluid flow between components and the corresponding geometric constraints between them and just a few channels of data, to model the leakage of a radial piston hydraulic motor. LÄS MER

  5. 4. Investigation Of The Influence Of Geometrical Parameters On Heat Transfer In Matrix Cooling : A Computational Fluid Dynamics Approach

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Fabian Maletzke; [2021]
    Nyckelord :turbine; blade cooling; matrix cooling; latticework cooling; CFD; heat transfer; RANS;

    Sammanfattning : Modern gas turbine blades and vanes are operated at temperatures above their material’s melting point. Active external and internal cooling are therefore necessary to reach acceptable lifetimes. One possible internal cooling method is called matrix cooling, where a matrix of intersecting cooling air channels is integrated into a blade or vane. LÄS MER

  7. 5. Numerisk beräkning av krypsättningar i pelarförstärkt lera

    Master-uppsats, KTH/Jord- och bergmekanik

    Författare :Emil Johansson; Victor Granlund Hedén; [2021]
    Nyckelord :CKD; DCM; Concrete Model; Creep settlement; DCM; Deep cement mixing; Plaxis 2D; Soft Soil Creep; Kalkcementpelare; Kryp; Multicementpelare; Sättningar; Contrete Model; Soft Soil Creep; Plaxis;

    Sammanfattning : I detta examensarbete har en utredning gjorts med syftet att undersöka lämpligheten att genomföra en djupstabilisering med multicementpelare (MC-pelare) i ett område med högt ställda sättningskrav. Detta genom att numeriskt simulera hur djupstabiliserad lera kan bete sig vid belastning med avseende på långtidsdeformationer. LÄS MER