Sökning: "Boundary corrections"

Hittade 5 uppsatser innehållade orden Boundary corrections.

  1. 1. Development of a Low Speed Wind Tunnel Test Campaign

    Master-uppsats, KTH/Flygdynamik

    Författare :Siwat Suewatanakul; [2021]
    Nyckelord :Aerospace; wind tunnel testing; aerodynamics; UAV; boundary corrections; support interference; CFD; Ansys Fluent; Aerospace; vindtunneltestning; aerodynamik; UAV; gränskorrigeringar; stödstörningar; CFD; Ansys Fluent;

    Sammanfattning : This study was performed to investigate aerodynamic characteristics of the 37.5% scaled­ down Green Raven MK18 airframe, to evaluate boundary corrections method, and to investigate on support interference. LÄS MER

  3. 2. Electronic structure calculations of defects in diamond for quantum computing : A study of the addition of dopants in the diamond structure

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Diana Elisa Murillo Navarro; [2019]
    Nyckelord :Density Functional Theory; Quantum computing; Diamond; Dopants; Quantum physics; NV color center;

    Sammanfattning : When doing computations on the negatively (positively) charged NV-center in diamond, the common procedure is to add (subtract) an electron from the system. However, when using periodic boundary conditions, this addition/subtraction of an electron from the supercell would result in a divergent electrostatic energy. LÄS MER

  4. 3. Wind tunnel blockage corrections forwind turbine measurements

    Master-uppsats, KTH/Mekanik

    Författare :Pieter Inghels; [2013]
    Nyckelord :Wind tunnel; wind turbine; numerical model; measurements; blockage; empirical correction scheme;

    Sammanfattning : Wind-tunnel measurements are an important step during the windturbinedesign process. The goal of wind-tunnel tests is to estimate theoperational performance of the wind turbine, for example by measuringthe power and thrust coecients. Depending on the sizes of both thewind turbine and the test section, the eect of blockage can be substantial. LÄS MER

  5. 4. An Experimental Study on Global TurbineArray Eects in Large Wind Turbine Clusters

    Master-uppsats, KTH/Mekanik

    Författare :Patrik Berkesten Hägglund; [2013]
    Nyckelord :GTAE; Global Turbine Array Eects; Wind tunnel; Reynolds number; Tip speed ratio; Thrust coecient; Induction factor; Turbine model; Wake eects; Wind farm; Aerodynamic scaling; Thrust measurement; Boundary corrections; Velocity prole;

    Sammanfattning : It is well known that the layout of a large wind turbine cluster aects the energyoutput of the wind farm. The individual placement and distances betweenturbines will in uence the wake spreading and the wind velocity decit. LÄS MER

  7. 5. Low-level jets – observationer från Näsudden på Gotland

    Magister-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Petra Johansson; [2004]
    Nyckelord :low-level jet; tröghetssvängning; vindmodell; modellutvärdering;

    Sammanfattning : Vid luftens passage från en typ av yta till en annan byggs ett internt gränsskikt upp där luftens egenskaper förändras successivt. Detta är grunden för bl.a. LÄS MER