Sökning: "tip leakage flow"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden tip leakage flow.

  1. 1. Establishing a methodology to investigate factors that affect Tip Leakage Loss : In a small scale Organic Rankine Cycle (ORC) turbine

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Anand Ashok Kaushik; [2022]
    Nyckelord :Ansys CFX; CFD; ORC; Turbines; Tip leakage; Internal flow; Loss; Entropy; Correlations;

    Sammanfattning : With growing awareness and necessity for the world to move towards more sustainable (energy saving) forms of power generation, focus on the commercial use of Organic Rankine Cycle (ORC) turbine systems has subsequently increased in turn. ORC systems with their modular design can thus help in recovering heat, obtained as a byproduct from a variety of industrial processes, and thereby increase their overall system efficiency. LÄS MER

  3. 2. Influence on tip leakage flow in a compressor cascade with plasma actuation

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

    Författare :Haotian Wang; [2019]
    Nyckelord :Flow control; DBD Plasma actuation; phenomenological model; numerical simulation; tip leakage flow; compressor cascade.; Flödesreglering; DBD Plasma‐aktuator; numerisk simulering; toppspelsflöde; kompressor kaskad.;

    Sammanfattning : As one of the key components of aero engines, compressor is required to endure higher pressure,  possess  higher  efficiency  and  wider  operating  range. Intensive studies have been made on tip leakage flow and researchers find that by reasonably organizing tip leakage flow, aero engines are  more likely to achieve better performance and reliability. LÄS MER

  4. 3. Study of tip clearance flows

    Master-uppsats, KTH/Flygdynamik

    Författare :Camille Fournis; [2018]
    Nyckelord :turbomachine; compressor; tip leakage flow; vortex; turbomaskin; kompressor; gapflöde; virvel;

    Sammanfattning : The tip leakage vortex is responsible for the generation of stagnation pressure losses inside the compressor along with the outbreak of rotating stall and surge. The current paper analytically proved that a part of the losses is proportional to the vortex circulation squared. LÄS MER

  5. 4. Sensitivity Analysis in 3D Turbine CFD

    Master-uppsats, KTH/Mekanik

    Författare :Simon Kern; [2017]
    Nyckelord :;

    Sammanfattning : A better understanding of turbine performance and its sensitivity to variations in the inletboundary conditions is crucial in the quest of further improving the efficiency of aero engines.Within the research efforts to reach this goal, a high-pressure turbine test rig has been designedby Rolls-Royce Deutschland in cooperation with the Deutsches Zentrum für Luft- und Raumfahrt(DLR), the German Aerospace Center. LÄS MER

  7. 5. Evolution of Cavity Tip Vortices in High-Pressure Turbines

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Albin Berglund; [2017]
    Nyckelord :CFD; turbomachinery; tip gap; fluid dynamics; cavity; rotor blade;

    Sammanfattning : This degree project in applied physics studies the tip gap flows over the rotor blades of a high-pressure turbine. The rotor blade used in the study has an improved design that utilizes both a cavity tip and an uneven profiling to reduce turbine loss. LÄS MER