Development of a high-order navier-stokes solver for aeroacoustic predictions of wind turbine blade sections

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2015

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Yalçın, Özgür

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Increased interest in renewable energy in the world has lead to research on wind turbines at a great pace. However, these turbines have come with a noise problem. The noise source of wind turbines is primarily aerodynamic noise highly related to complex, three dimensional, unsteady flow fields around them. Therefore, determination of these sources requires successful, accurate, turbulent flow solutions. In addition, because acoustic waves are non-dispersive and non-dissipative, such solutions must be carried out using low dissipation and low dispersion numerical schemes. Motivated by these points, a high order, parallel Navier-Stokes solver with ’dispersion-relation- preserving’ (DRP) feature and delayed detached eddy simulation (DDES) capability has been developed. In this thesis, after the numerical methodology through this development is presented, some validation procedures are carried out in order to test order of accuracy, far field boundary conditions, inviscid and viscous flux routines, and DDES capability of the solver. Finally, the results of the turbulent flow structures causing noise around a NACA0012 blade section is demonstrated with the comparisons and comments.

Subject Keywords

Wind turbines., Blades., Aeroacoustics., Navier-Stokes equations.

URI

http://etd.lib.metu.edu.tr/upload/12619195/index.pdf
https://hdl.handle.net/11511/24941

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ö. Yalçın, “Development of a high-order navier-stokes solver for aeroacoustic predictions of wind turbine blade sections,” M.S. - Master of Science, Middle East Technical University, 2015.