Search for dissertations about: "freestream turbulence"

Showing result 1 - 5 of 6 swedish dissertations containing the words freestream turbulence.

  1. 1. On stability, transition and turbulence in three-dimensional boundary-layer flows

    University dissertation from KTH Royal Institute of Technology

    Author : Seyed Mohammd Hosseini; KTH.; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Receptivity; stability; optimal growth; three-dimensional bound- ary layers; crossflow instability; roughness control; freestream turbulence; sec- ondary instability; transition; turbulence;

    Abstract : A lot has changed since that day on December 17, 1903 when the Wright brothers made the first powered manned flight. Even though the concepts behind flying are unaltered, appearance of stat-of-the-art modern aircrafts has undergone a massive evolution. READ MORE

  2. 2. Stability and transition of three-dimensional boundary layers

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Seyed Mohammad Hosseini; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Receptivity; stability; optimal growth; three-dimensional boundary layers; crossflow instability; roughness control; freestream turbulence; secondary instability;

    Abstract : A focus has been put on the stability characteristics of different flow types existing on air vehicles. Flow passing over wings and different junctions on an aircraft face numerous local features, ranging from different pressure gradients, to interacting boundary layers. READ MORE

  3. 3. Streak breakdown and transition control in wall-bounded flows

    University dissertation from Stockholm : KTH

    Author : Fredrik Lundell; KTH.; [2000]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; active control; laminar-turbulent transition; freestream turbulence; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : .... READ MORE

  4. 4. Laninar-turbulent boundary layer transition influenced by free stream turbulence

    University dissertation from Stockholm : Mekanik

    Author : Jonas Westin; KTH.; [1997]
    Keywords : ;

    Abstract : Laminar-turbulent transition in a flat plate boundary layerhas been considered, with a special emphasis on the influencefrom free stream turbulence (FST)First, experiments on linear stability ofTollmien-Schlichting (TS) waves in a Blasius boundary layer wasstudied. This is a well-known example from hydrodynamicstability theory, which has hitherto suffered from unresolveddiscrepancies between experiments and linear theory. READ MORE

  5. 5. Flow control of boundary lagers and wakes

    University dissertation from Stockholm : KTH

    Author : Jens H. M. Fransson; KTH.; [2003]
    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; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP 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