Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Havacılık ve Uzay Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2015
Tezin Dili: İngilizce
Öğrenci: Özgür Yalçın
Danışman: YUSUF ÖZYÖRÜK
Özet: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.