Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
DEVELOPMENT OF A PRESSURE FORMULATION TO CONSIDER FRICTION DRAG IN THE VORTEX METHOD
Submission Author:
Renan Renoldi , SP , Brazil
Co-Authors:
Renan Renoldi, Alex Bimbato, Luiz Antonio Alcântara Pereira
Presenter: Renan Renoldi
doi://10.26678/ABCM.COBEM2019.COB2019-0494
Abstract
In the present paper the vortex method is used in conjunction with panel method to study the two-dimensional, incompressible, subsonic flow with constant properties around a four digits NACA airfoil. Using this lagrangian approach, the vorticity dynamic is studied following discrete vortices at each time step of the numerical simulation; with this purpose the vorticity transport equation is satisfied by an advection and a diffusion dislocation of each discrete vortex used to represent the vorticity field. Flat panels with linear vorticity distribution are used to represent the airfoil geometry. The main contribution of this paper is to develop a pressure formulation that is able to take into account the friction drag which is dominant in problems that involve flow around slender bodies with low angles of attack. The results will be compared with experimental ones available in the literature and observing the preliminary data obtained it is possible to conclude that the final version of the paper will present good results.
Keywords
Friction Drag, airfoil, Vortex Method, panel method, Lagrangian approach
