Numerical investigation of characteristics of pitch and roll damping coefficients for missile models

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Date

2012

Author

Kayabaşı, İskander

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In this thesis the characteristics of pitch and roll damping coefficients of missile models are investigated by using Computational Fluid Dynamics (CFD) techniques. Experimental data of NACA0012 airfoil, Basic Finner (BF) and Modified Basic Finner (MBF) models are used for validation and verification studies. Numerical computations are performed from subsonic to supersonic flow regimes. Grid refinement and turbulence model selection studies are conducted before starting the dynamic motion simulations. Numerical method of dynamic motion simulation is validated with a 2D NACA0012 airfoil. After the validation of numerical method, forced-oscillation motion is given to the BF and MBF models. In order to get deeper understandings about the characteristics of dynamic pitching and rolling motions, parametric studies are performed. The amplitude and frequency of forced-oscillation motions are investigated one by one. The effects of angle of attacks are also investigated for both pitching and rolling motions. The results of CFD simulations are compared with experimental data obtained from different wind tunnel and free flight tests. It is seen from these comparisons that experimental and numerical results are in good agreement throughout the whole flow regime. In conclusion, the numerical method presented in this study is validated and can be used for the prediction of pitch and roll damping coefficient of any missile configurations.

Subject Keywords

Rockets (Aeronautics)., Guided missiles., Computational fluid dynamics., Damping (Mechanics)., Oscillations.

URI

http://etd.lib.metu.edu.tr/upload/12614917/index.pdf
https://hdl.handle.net/11511/21809

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

İ. Kayabaşı, “Numerical investigation of characteristics of pitch and roll damping coefficients for missile models,” M.S. - Master of Science, Middle East Technical University, 2012.