The effects of static aeroelasticity on the performance of two-dimensional converging diverging nozzles

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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: 2014

Öğrenci: ÜMRAN DÜZEL

Danışman: SİNAN EYİ

Özet:

This thesis analyzes the effects of static aeroelasticity on the performance of two dimensional converging diverging nozzles. A Flow analysis is conducted on five different configurations of two dimensional converging-diverging nozzles. Computational study is validated with experimental data. Two of the configurations, which have the same throat area, throat radius, and convergence angle and total nozzle length, are selected as the baseline geometries. By modifying throat radius and keeping all other geometric parameters to be the same, three more configurations are obtained so that throat contouring can be examined as well. Flow analyses are performed by using FLUENT flow solver software. By considering nozzle walls as flexible structure, a static aeroelastic model is implemented. Stiffness, coordinate system transformation, force vector matrices have been obtained for structural model. The flexible wall implementation uses two-dimensional linear beam model. The results of flexible and rigid walls are compared for different nozzle thicknesses. Axisymmetric cases are added to the model to present the differences