Numerical Analysis of 3D model flapping Flat Plate

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Havacılık ve Uzay Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2016

Tezin Dili: İngilizce

Öğrenci: Begüm Dizman

Danışman: Dilek Funda Kurtuluş

Özet:

Flapping Micro Air Vehicles (MAV) studies gain an importance recently and in the future they will be used in civil and military applications in a widespread manner. Wing mechanism of MAV’s is similar to birds’ and insects’ wing motion and is highly maneuverable. This flapping motion provides them fly in low Reynolds Number. In order to understand successful flight of MAVs , time dependent aerodynamic performance must be investigated in detail. This study includes investigation of 3D sweeping of flat plate numerically in water. The numerical simulations are performed at different constant pitch angles ( 5º, 30º and 45º) and sinusoidal sweeping angles with 30º and 60º which are 60 º and 120 º amplitudes. In the current study , water tank and 3D flat plate was modelled and analysis are carried out with a commercial CFD code and dynamic mesh option is used with user defined subroutines. Laminar Navier Stokes equations are used since the motion was in hover mode and at very low Reynolds numbers. Unsteady 3D aerodynamic forces are obtained. The purpose of this study is to examine pressure distribution and aerodynamic force coefficient effects of 3D time dependent wing numerically. In addtion , velocity vectors and streamlines effects are investigated on different planes. To the knowledge of the author, there are no other studies that investigate sweeping motion with different amplitudes at different pitch angles for flat plate.