Search for dissertations about: "Free stream turbulence"

Showing result 11 - 15 of 45 swedish dissertations containing the words Free stream turbulence.

  2. 11. Flow control of boundary lagers and wakes

    Author : Jens H. M. Fransson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laminar-turbulent transition; asymptotic suction boundary layer; free stream turbulence; Tollmien-Schlichting wave; stability; flow control; cylinder wake; Engineering mechanics; Teknisk mekanik;

    Abstract : Both experimental and theoretical studies have beenconsidered on flat plate boundary layers as well as on wakesbehind porous cylinders. The main thread in this work iscontrol, which is applied passively and actively on boundarylayers in order to inhibit or postpone transition toturbulence; and actively through the cylinder surface in orderto effect the wakecharacteristics. READ MORE

  4. 12. Experimental studies of bypass transition and its control

    Author : Fredrik Lundell; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluid mechanics; active control; Laminar-turbulent transition; free-stream turbulence; Engineering mechanics; Teknisk mekanik;

    Abstract : Bypass transition, i.e. transition of a boundary layer at subcritical Reynolds numbers, has been studied. Fundamental studies of the phenomenon as such have been performed side by side with experiments aimed at controlling, i. READ MORE

  5. 13. Investigations of the asymptotic suction boundary layer

    Author : Jens H. M. Fransson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asymptotic suction boundary layer; Laminar-turbulent transition; Tollmien-Schlichting waves; Free stream turbulence; Engineering mechanics; Teknisk mekanik;

    Abstract : .... READ MORE

  6. 14. Wind turbine simulations using spectral elements

    Author : Elektra Kleusberg; Dan Henningson; Philipp Schlatter; Stefan Ivanell; Johan Meyers; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wind turbine; wakes; wake interaction; computational fluid dynamics; actuator line method; spectral elements; free-stream turbulence; Engineering Mechanics; Teknisk mekanik;

    Abstract : Understanding the flow around wind turbines is a highly relevant research question due to the increased interest in harvesting energy from renewable sources. This thesis approaches the topic by means of numerical simulations using the actuator line method and the incompressible Navier–Stokes equations in the spectral element code Nek5000. READ MORE

  7. 15. Characteristics of mean and fluctuating surface pressure distributions on tubes in tandem arrangement and in-line tube bundles

    Author : Lars Ljungkrona; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flow visualizations; in-line square tube bundle; pressure distributions; free-stream turbulence; pressure fluctuations; in-line arrangement; circular cylinders in cross-flow; Strouhal numbers; tandem arrangement;

    Abstract : .... READ MORE