Sökning: "wind tunnel effects"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden wind tunnel effects.

  1. 1. Design of compact automotive heat exchanger, analysing the effects of RANS models and utilising Additive Manufacturing

    Kandidat-uppsats, KTH/Fysik

    Författare :Nikhil Srikkanth; Bartosz Brzuchalski; [2022]
    Nyckelord :Turbulence; Reynolds Averaged Navier-Stokes; KTH Formula Student; metal additive manufacturing; CFD; turbulent kinetic energy; boundary layer;

    Sammanfattning : The analytical modelling of complex turbulent airflow remains one of the great unsolved mysteries of physics, but in this paper two widely used Reynolds Averaged Navier-Stokes models (k-$\epsilon$ and k-$\omega$ SST) are compared while designing a heat exchanger for the KTH Formula Student electric race car. CAD software was used to design lattices for the heat exchanger core and theorise about how to increase heat transfer while also taking into account the utilisation of metal additive manufacturing. LÄS MER

  3. 2. Development of a CFD Boundary Condition to Simulate a Perforated Surface

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Medet Kiflemariam; [2021]
    Nyckelord :Computational Fluid Dynamics; CFD; Boundary Condition; Bleed; Aerospace Engineering; Aeronautical Engineering; Physics;

    Sammanfattning : In aircraft with jet propulsion engine intakes at supersonic speed, strong pressure waves referred to as shockwaves occur, which may interact with any present boundary layers along the intake surface. The adverse pressure gradients associated with Shock Wave-Boundary Layer Interaction (SWBLI) may cause boundary layer flow separation, which can result in disturbances of the flow that can be harmful to the device or decrease engine performance. LÄS MER

  4. 3. Numerical study of the effects of wind-tunnel conditions on a passenger vehicle in crosswinds

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Sahil Gupta; Vivek J Shah; [2020]
    Nyckelord :;

    Sammanfattning : Wind tunnel tests is a necessity when it comes to study of aerodynamic flow field around vehicle in its development process. However, there are certain limitations on physical wind tunnel tests during vehicle development process. This includes high running costs and interference effects due to blockage and boundary conditions. LÄS MER

  5. 4. Rig Performance Evaluation for Wind Powered Pure Car Carrier

    Master-uppsats, KTH/Marina system

    Författare :Valérie Aurore Bouysses; [2020]
    Nyckelord :;

    Sammanfattning : Carrying around 80-90% of world volume of goods, the shipping industry has a considerable environmental impact. The International Maritime Organization (IMO) fixed a 50% greenhouse gases emission reduction target by 2050 with respect to 2008 levels. LÄS MER

  7. 5. Experimental and CFD Study of Heat Pickup in Cooling System Hoses

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :August Borg; Michael Owen; [2019]
    Nyckelord :;

    Sammanfattning : This thesis investigates a process known as heat pickup which occurs in vehicle cooling system hoses. Heat pickup is an unwanted side effect of temperature differences in a car underhood compartment, whereby excess heat is tranferred into the coolant running through the cooling system hoses, affecting its operating temperature. LÄS MER