EPTT 2020

12th Spring School on Transition and Turbulence

NUMERICAL INVESTIGATION OF WAVY LEADING EDGE EFFECTS ON DRAG AND LIFT COEFFICIENTS OF NACA 0015 AIRFOIL.

Submission Author: João Victor Salvaro , SC
Co-Authors: João Victor Salvaro, Gustavo Luiz Macedo da Silva, Fernando Almeida Rocha
Presenter: João Victor Salvaro

doi://10.26678/ABCM.EPTT2020.EPT20-0051

 

Abstract

Wavy leading edge airfoils have been investigated as a flow control mechanism to increase aerodynamic performance. The overall aim of this study is to investigate through numerical methods the aerodynamic effects caused by the A3λ11 (tubercles with amplitude and wavelength equal to 3% and 11% of chord, respectively) wavy configuration at the leading edge for a NACA 0015 airfoil. The CFD simulations were executed with Ansys Fluent at Reynolds number 68.000 and considered for different angles of attack in the pre-stall and post-stall regimes. Numerical investigations showed results of drag and lift coefficients as a function of angle of attack for airfoils with and without tubercles. Moreover, they showed the distribution of pressure and velocity around the airfoils and allowed the visualization of aerodynamic phenomena caused by modifications at the leading edge. The visualization of these distributions helps to understand the influence of the wavy leading edge on the drag and lift values when compared to the smooth configuration. The wavy profile anticipated the stall angle by approximately 2° and the maximum values of drag coefficients when compared to the baseline geometry. In contrast, the tubercles presented the maximum lift coefficient 2.2% higher than the baseline airfoil. In the post-stall regime, the wavy profile presented lift values 27.2% higher than the smooth configuration. The increase on the lift coefficient using the wavy leading edge obtained in this study coincided with literature data.

Keywords

Aerodynamics, CFD, Drag, Lift, Wavy Leading Edge

 

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