Sökning: "upstream turbulence"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden upstream turbulence.

  1. 1. Turbulence Intensity Measurements in a High-Pressure Gas Turbine Stage

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Ettore Scami; [2022]
    Nyckelord :Turbulence Intensity; turbine; stage efficiency; grid; turbomachinery; length scales;

    Sammanfattning : This Thesis work focused on the acquisition and evaluation of data on mean velocity, turbulence intensity and length scales obtained via hot wire measurements in a high pressure single-stage land-based turbine available at the Department of Heat and Power Technology in KTH. Turbulence was generated by the use of grids and twoprobes, upstream and downstream of the turbine stage, were used. LÄS MER

  3. 2. Design av passageflyktöppningar: Substrats påverkan på nedströmspassage av mört (Rutilus rutilus)

    Master-uppsats, Karlstads universitet

    Författare :Rebecka Möller; [2021]
    Nyckelord :substrate; roach; fishpassage; bypass; Substrat; mört; fiskpassage; flyktöppning;

    Sammanfattning : Vattenkraftens effekter på vandrande fiskarter har varit kända länge och väldigt få har de anpassningar som behövs för att vara funktionella för både upp-och nedströmsvandring för migrerande arter. Numera vet man det även finns ett behov för svagsimmande arter att använda fiskpassager och för att underlätta för dessa så har man testat olika alternativ som ska fungera för flera olika arter, bl. LÄS MER

  4. 3. The resilience of the food supply chain to pandemic COVID-19 : a case study on the impacts of the novel Corona in the grain industry of Swedish food supply chain

    Master-uppsats, SLU/Dept. of Economics

    Författare :Hafiza Khandaker; [2021]
    Nyckelord :Corona pandemic; resilience; Lantmännen grain supply chain; flexibility adaptability; robustness; collaboration; supply chain risk management; vulnerability; business continuity; sustainable risk management culture;

    Sammanfattning : Today’s business climate is subject to a variety of challenges associated with environmental turbulence that demands resilience to achieve sustainable business. The rare external disruption by a natural cause like a pandemic directly affects the organization’s ability to continue its operations from getting raw materials from suppliers to provide finished goods to market. LÄS MER

  5. 4. RANS & WMLES Simulations of Compressor Corner Separation

    Master-uppsats, KTH/Mekanik

    Författare :Arthur Poulain; [2019]
    Nyckelord :Corner Separation; Compressor Linear Cascade; RANS; Wall-Modeled LES; Boundary Layer; Anisotropy; Hörnseparation; Kompressor Linjär Kaskad; RANS; Vägg-Modell LES; Gränsskikt; Anisotropi;

    Sammanfattning : In axial compressor, corner separation phenomenon can occur between the blade surface and the hub. This leads to high total pressure losses, blockage and may worsen to surge. Various studies on NACA65-009 blade were previously performed experimentally and numerically to predict the corner separation. LÄS MER

  7. 5. Structural intrusion, flow disturbance and spillway capacity : CFD modeling of the Torpshammar dam

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Adéle Wallin; [2018]
    Nyckelord :RNG k-ε model; VOF; Fluent; turbulence; rectangular beams; flow pattern; discharge capacity; flow velocity;

    Sammanfattning : At the Torpshammar dam two rectangular beams are situated upstream of the spillway gates to stabilize the sidewalls holding the embankment of the dam. A computational fluid dynamics (CFD) simulation of the dam with the bottom outlets open was made to investigate how the flow and discharge capacity is affected by the beams. LÄS MER