Publicação: Numerical Simulations of High-lift Configurations on a NACA4412 Airfoil
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CNPQ::ENGENHARIAS::ENGENHARIA AEROESPACIAL::AERODINAMICA, CNPQ::ENGENHARIAS::ENGENHARIA AEROESPACIAL::SISTEMAS AEROESPACIAIS::AVIOES
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This work addresses the numerical simulation of high-lift systems in the aeronautical
industry. The main objective was to evaluate the performance of different configurations
of such high-lift devices, identifying their advantages and disadvantages. The secondary
objective was to develop a robust numerical method for simulating flows around airfoils,
using the OpenFOAM software. Numerical analyses were carried out on five different
configurations — namely, the plain flap, split flap, slotted flap, Fowler flap and Junkers
flap — under similar conditions, allowing for a consistent comparison of outcomes. All
flaps were deflected by 10◦ and analyzed at a Reynolds of 1.7 · 105 over a range of angles
of attack between −4
◦ and 16◦
. The Spallart-Almarras turbulence model was used in all
simulations, which were carried out in the steady state. Quantitative results were analyzed
for the coefficients of lift (Cl
) and drag (Cd
) per unit length and the coefficient of pressure
(Cp) on the surfaces of the airfoils analyzed, as well as the velocity and pressure fields of
the flows.
To check the quality of the simulation, the method was used to replicate experimental
and numerical results obtained by other authors for the flow around airfoils (flapped or
not). In addition, the convergence of the simulation between successively refined meshes
and the quality of the boundary layer modeling from the dimensionless parameter y
+
were analyzed, and both obtained good results with residual errors in the order of 10−5
.
The results obtained show the efficiency and robustness of the proposed method and its
applicability in different scenarios. It was found that the simulations presented reliable
and coherent results for lift and drag generation, but for angles of attack close to stall,
convergence was more difficult. In addition, it was possible to identify the superiority in
lift generation of the flap configurations most commonly used in the aeronautical industry,
such as the slotted flap and the Fowler flap.
Abstract
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Numerical simulation; OpenFOAM; High-lift devices; Flaps.
Citação
CASTRO, Thiago Rezende de. Numerical Simulations of High-lift Configurations on a NACA4412 Airfoil. 2024. 63 f. Trabalho de Conclusão de Curso (Graduação em Engenharia Aeronáutica) – Universidade Federal de Uberlândia, Uberlândia, 2024.
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