Sökning: "Reynolds Averaged Navier-Stokes"

Visar resultat 1 - 5 av 46 uppsatser innehållade orden Reynolds Averaged Navier-Stokes.

1. 1. Computational Fluid Dynamics and Modeling of a Free Surface Flow

   Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Mathieu Marmier; [2023]
   Nyckelord :CFD; Free Surface Flow; VOF; STAR-CCM ; Multiphase Simulation; Nuclear Engineering; Fluid Mechanics;

   Sammanfattning : This project deals with the CFD modelling of a free surface flow. The aim is to develop and validate a fast and accurate numerical model for stratified two-phase flows. Volume of Fluid (VOF) multiphase model is employed. The purpose is to use the developed numerical model for the design of an element within a compact nuclear reactor. LÄS MER

3. 2. Simulation of Combustion in a Hybrid Rocket Engine

   Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Oscar Andersson; [2023]
   Nyckelord :Thesis; Hybrid Rocket Engine; CFD; computational fluid dynamics; combustion;

   Sammanfattning : A numerical investigation on the combustion mechanics of a hybrid rocket engine is performed through unsteady Reynolds-averaged Navier-Stokes simulation. The hybrid rocket engine model is based on an experimental laboratory scale engine design operating on GOX and HDPE as a propellant. LÄS MER

4. 3. Active flow control of the turbulent boundary layer over a NACA4412 wing profile for skin friction drag reduction

   Master-uppsats, KTH/Teknisk mekanik

   Författare :Giacomo Semprini Cesari; [2023]
   Nyckelord :Active flow control; drag reduction; numerical simulations; turbulent boundary layer; wings;

   Sammanfattning : In the context of building a framework for active flow control of turbulent boundary layers in wings, a set of large-eddy simulation (LES) are implemented in OpenFOAM. The flow around a NACA4412 wing profile is simulated at 5° angle of attack and Re_c = 400˙000. LÄS MER

5. 4. CFD Analysis of the Flow Around a Paraglider Wing

   Master-uppsats, KTH/Teknisk mekanik

   Författare :Caterina Gennari; [2023]
   Nyckelord :Paraglider Wing; CFD; RANS; DES; Aerodynamics; Aerodynamic Hysteresis; FSI; Deformable Structure; Membrane; Shell Elements;

   Sammanfattning : In this study, the characteristics of the flow around a paraglider wing were investigated through the use of Computational Fluid Dynamics (CFD) simulations by solving both Reynolds Averaged Navier-Stokes equations and Delayed Detached Eddy Simulations were employed. This allowed the observation of how the unique shape of the canopy of a paraglider can influence the behaviour of the flow and how aerodynamic hysteresis can manifest on this sort of wing. LÄS MER

7. 5. Computational Analysis of Spray Deflector Designs

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Osman Gyokhan Ali; [2023]
   Nyckelord :Planing Hulls; Spray Deflector; Hull Modification; Computational fluid dynamics CFD ; resistance; trim angle; heave; CD-adapco Star CCM ; Numerical Ventilation; Phase Replacement; Modified HRIC Scheme; Volume Fraction Source Term; Reynolds averaged Navier-Stokes RANS ; Volume of Fluid VOF ; SST K-Omega Turbulence Modelling; Höghastighetshantverk; modelldesign; spraydeflektor;

   Sammanfattning : Planing hull is a common hull design concept which decreases the resistance while speed is increasing for a specific speed range. It is also suitable for hull modifications to achieve higher efficiency. Spray deflector is a promising hull modification which offers extra resistance decreasing and less vertical acceleration for planing hulls. LÄS MER