Advanced search

Found 3 essays matching the above criteria.

1. 1. Two-dimensional roughness and Tollmien-Schlichting waves: a study on transition

   University essay from KTH/Strömningsmekanik och Teknisk Akustik

   Author : Derek Micheletto; [2020]
   Keywords : ;

   Abstract : Two-dimensional (2D) roughnesses induce premature transition to turbulence in laminar boundary layers by amplifying the disturbances in the flow and promoting the development of non-linearities. The present thesis aims at furthering our understanding of this phenomenon's underlying mechanisms and elucidating the effects of the different geometrical parameters of the roughness' cross section. READ MORE

3. 2. Analysis and control of boundary layer transition on a NACA 0008 wing profile

   University essay from KTH/Mekanik

   Author : Arijit Sinha Roy; [2018]
   Keywords : boundary layer stability; laminar - turbulent transition; laminar flow control; Tollmien-Schlichting waves; streaky boundary layers; miniature vortex generators; Falkner-Skan boundary layer.;

   Abstract : The main aim of this thesis was to understand the mechanism behind the classical transition scenario inside the boundary layer over an airfoil and eventually attempting to control this transition utilizing passive devices for transition delay. The initial objective of analyzing the transition phenomenon based on TS wave disturbance growth was conducted at 90 Hz using LDV and CTA measurement techniques at two different angles of attack. READ MORE

4. 3. Controlling the Laminar-to-Turbulent Transition in a Fluid Flow

   University essay from KTH/Mekanik

   Author : Sundin Johan; [2015]
   Keywords : ;

   Abstract : Det finns många vardagliga anordningar där en fluid interagerar med en yta. Reduktion av ytfriktion mellan fluiden och ytan kan förbättra verkningsgraden för många av dessa anordningar. Ett typiskt exempel på denna interaktion är flödet över en platt yta. READ MORE