Design of a grid fin aerodynamic control device for transonic flight regime

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2015

Öğrenci: ERDEM DİKBAŞ

Eş Danışman: CÜNEYT SERT, ÖZGÜR UĞRAŞ BARAN

Özet:

Grid fins is unconventional control devices and they are used for aerodynamic control of various types of missiles. Low hinge moment requirement and superior packaging possibilities make grid fins attractive when compared to conventional planar fins. However, design of grid fins is more involved when transonic flight regime is considered. The reason for this is high drag force encountered by the grid fin. The purpose of the thesis is to overcome this drawback and to define a proper design methodology for transonic flight regime. Computational Fluid Dynamics (CFD) is utilized as main tool in calculation of aerodynamic force and moments. Computational efforts are significantly easified by utilization of `unit grid fin' concept, which is introduced in this thesis study. At the end, an equivalent control performance is accomplished with a more efficient design when compared to a conventional planar fin example.