Sökning: "bluff body"

Hittade 4 uppsatser innehållade orden bluff body.

  1. 1. A numerical comparison of the thermoacoustics for different equivalence ratios for n-dodecane using LES

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Björn Jarfors; [2023]
    Nyckelord :Computational Fluid Dynamics; Bluff-body stabilised flames; Large Eddy Simulation; Thermoacoustics; Acoustics; NEUMANN Project; Jet engines; Aero engines; Airplanes; Combustion; Numerics; Technology and Engineering;

    Sammanfattning : Klimatförändringarna påverkar vår värld och det behövs ett mer hållbart samhälle. Flygindustrin är i behov av förändring, men flygmotorer är mycket komplexa och tar tid att utveckla. Termoakustiska instabiliteter har kraften att förstöra en motor, men också att minska miljöpåverkan. LÄS MER

  3. 2. Effect of upstream turbulence on truck aerodynamics

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Zhivko Nikolov; [2017]
    Nyckelord :SCANIA; upstream turbulence; truck aerodynamics; Jakob Mann s method;

    Sammanfattning : The aerodynamic team at SCANIA has discovered the need to investigate the effect of the upstream turbulence conditions on the aerodynamics of the trucks. This need comes from the fact that there are differences between the drag coefficients obtained using computational fluid dynamics (CFD) and the on-road measurements. LÄS MER

  4. 3. Koopman mode analysis of the side-by-side cylinder wake

    Master-uppsats, KTH/Mekanik

    Författare :Jimmy Röjsel; [2017]
    Nyckelord :Bluff body; wake flow; Side-by-side cylinder wake; Flip-op instability; Modal analysis; Koopman operator; Koopman mode decomposition;

    Sammanfattning : In many situations, fluid flows can exhibit a wide range of temporal and spatial phenomena. It has become common to extract physically important features, called modes, as a first step in the analysis of flows with high complexity. LÄS MER

  5. 4. Motorcycle Cornering Improvement : An Aerodynamical Approach based on Flow Interference

    Master-uppsats, KTH/Aerodynamik; KTH/Mekanik

    Författare :Vojtech Sedlak; [2012]
    Nyckelord :aerodynamic; fluid mechanics; interference; blockage; airfoil; wing; bluff body; motorcycle; moto; motorbike; MotoGP; road racing; aerodynamik; fluid mekanik; flöde interferenser; vinge; motorcyckel; MotoGP; roadracing;

    Sammanfattning : A new aerodynamic device, based on flow interference effects, is studied in order to significantly improve the cornering performance of racing motorcycles in MotoGP. After a brief overview on why standard downforce devices cannot be used on motorcycles, the new idea is introduced and a simplified mechanic analysis is provided to prove its effectiveness. LÄS MER