Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
COMPUTATIONAL AND EXPERIMENTAL ANALYSES OF THE AIRFLOW OVER A ROCKET MODEL
Submission Author:
Vitor Gabriel Ferraz Leite Rebouças de Farias , MG , Brazil
Co-Authors:
Vitor Gabriel Ferraz Leite Rebouças de Farias, Victor Carpigiani da Silva Bezas, Felipe Ribeiro, Odenir de Almeida
Presenter: Vitor Gabriel Ferraz Leite Rebouças de Farias
doi://10.26678/ABCM.COBEM2019.COB2019-1697
Abstract
This work has the goal to present the results of computational and material experiments of the flow over a stationary rocket, analyzing the drag coefficient and how it behaves according to the Reynolds number. The initial hypothesis is that the fluid velocity is between the interval in which the flow is considered incompressible, that is, from air flows in velocities that ranged from 12 m/s to 24 m/s. The computational fluidodynamic simulations (CFD) were made by Ansys Fluent software and for its solver the Shear-Stress Transport (SST) k-w model was used which accounts for the transport of the turbulence shear stress in the definition of the turbulent viscosity. The material experimentation was carried out in the Center of Research in Experimental Aerodynamics’ (CPAERO’s) wind tunnel, in order to validate the computational results. In the CFD simulation, an average drag coefficient of 0,63 was obtained and with the wind tunnel experiment, a value of 0,30, representing a relative error of 109 % for the Reynolds range from 4.10^5 to 1.10^6. Future research will be developed to better understand the reasons that led to the discrepancy in the results.
Keywords
Rocket, Wind Tunnel, CFD, Aerodynamics, fluid mechanics
