Aerodynamic Characterisation of Rocket Fin Flutter Using Computational Fluid Dynamics (CFD)

Dr Nnorom Achara • Engr Bongdap Nanbol Keza
Journal article World Journal of Innovative Research • August 2018

Abstract

In this study a theoretical flutter model has been used in MATLAB to obtain flutter speeds for subsequent use in ANSYS analysis. The geometry of the fin was created in Solid works CAD platform and exported to ANSYS fluent, where input of influence parameters were made and analyzed for aerodynamic pressures.nbsp These were then mapped to the structural fin in ANSYS mechanical and the resulting deformations viewed. The aerodynamic behaviors of rocket fin were studied and the results before the flutter speed, at the flutter regime and after the flutter speed were displayed. The aerodynamic pressure is found to be highest at the leading edge and the deformation turns from bending to torsion as the flutter speed increases.nbsp The post-critical flutter records the highest displacement.nbsp The work also showed the modal analysis of the rocket fin with the natural frequencies which were validated with data from Falcon V launch. nbsp

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Journal

World Journal of Innovative Research

World Journal of Innovative Research (WJIR) is an international, monthly, peer reviewed multidis... see more