CREEM2022

CREEM 2022 - XXVIII Congresso Nacional de Estudantes de Engenharia Mecânica

Preliminary Studies of the Influence of Surface Temperature on the Aerodynamic Coefficients of Biomimetic-based Airfoils

Submission Author: Luca Sauer de Araujo , RS , Brazil
Co-Authors: Andres Gilberto Machado da Silva Benoit, Luca Sauer de Araujo, Luiz Henrique Schaffazick, Giuliano Demarco, César Gabriel dos Santos
Presenter: Luca Sauer de Araujo

doi://10.26678/ABCM.CREEM2022.CRE2022-0053

 

Abstract

It is well known that airfoils represent an important subject of aerodynamics studies and the search for better drag and lift coefficients (cD and cL, respectively) is continuously ongoing. Beyond that, for a long time engineering has been searching for optimal solutions through nature observation, in a process inspired on biology and called biomimetics. Considering this, the current work is intended to ascertain the influence of a temperature difference between lower and upper surface over the aerodynamics coefficients of a symmetric airfoil NACA 0012, based on a process that can be found on birds. The study makes the evaluation of viability of implementation of such methods possible and also looks into the interactions between temperature and flow over lift devices. In order to do that, numerical methods of Computational Fluid Dynamics (CFD) were applied taking into account Low Reynolds Number. In addition to that, warming possibilities of upper and lower surface were both separately evaluated. The analysis was carried out considering the ratio between cL and cD and the results obtained show that, for a 50ºC difference, the heating of the lower surface promote improvement on the lift while maintaining the drag coefficient nearly the same, thus enhancing the lift to drag ratio for the significant majority of angles of attack analyzed.

Keywords

heating, Lift Coefficient, drag coefficient, Airfoil NACA0012, Lift-to-Drag Ratio

 

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