Aerodynamic analysis of flatback airfoils using vortex particle method

Haser, Senem Ayşe
In this thesis, aerodynamic analysis of flatback airfoils, which have been proposed and investigated to improve the aerodynamic performance of thick airfoils, is studied. Vortex particle method, which is commonly used for simulation of two dimensional, incompressible, viscous flows, is used for this purpose. In the content of this thesis, vortex particle method code developed by Kaya [1] is improved by changing method of diffusion and method of vorticity releasing from solid boundary. Deterministic Particle Strength Exchange (PSE) method is implemented to solve diffusion equation. In addition, instead of vortex particle releasing algorithm, vorticity releasing algorithm, which is more suitable for PSE method, is implemented. The method and algorithm are explained in detail and results of analysis are presented. The validation and applicability of the improved code is illustrated by solving flow past a flat plate, a circular cylinder and a square cylinder. After that, flow around FB3500 series flatback airfoils at Reynolds number of 1000 are simulated by using the improved vortex particle method code. In order to compare results, laminar and unsteady Computational Fluid Dynamics (CFD) analyses are performed.


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In this study, tip injection is implemented on a model Horizontal Axis Wind Turbine (HAWT) rotor to investigate the power and thrust coefficient variations as well as the wake characteristics. The model wind turbine has a 0.95 m diameter 3-bladed rotor with non-linearly twisted and tapered blades that has NREL S826 profile. The nacelle, hub and the blades are specifically designed to allow pressurized air to pass through and get injected from the tips while the rotor is rotating. The experiments are perform...
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A new methodology is developed to find the optimal aerodynamic performance of a turbine cascade. A boundary-layer coupled Euler algorithm and a genetic algorithm are linked within an automated optimization loop. The multiparameter objective function is based on the blade loading. For a given inlet Mach number and baseline cascade geometry, the flow inlet and exit angles, the blade thickness and the solidity are optimized by a robust genetic algorithm. First, the Sanz subcritical turbine cascade is selected ...
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Citation Formats
S. A. Haser, “Aerodynamic analysis of flatback airfoils using vortex particle method,” M.S. - Master of Science, Middle East Technical University, 2014.