Sökning: "Tollmien-Schlichting waves"
Hittade 3 uppsatser innehållade orden Tollmien-Schlichting waves.
1. Two-dimensional roughness and Tollmien-Schlichting waves: a study on transition
Master-uppsats, KTH/Strömningsmekanik och Teknisk AkustikSammanfattning : 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. LÄS MER
2. Analysis and control of boundary layer transition on a NACA 0008 wing profile
Master-uppsats, KTH/MekanikSammanfattning : 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. LÄS MER
3. Controlling the Laminar-to-Turbulent Transition in a Fluid Flow
Kandidat-uppsats, KTH/MekanikSammanfattning : 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. LÄS MER