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Abstract(s)
A biomimética é uma área da ciência que se dedica ao estudo da natureza, tendo por base
a sua imitação. Os perfis oscilantes, na natureza, apresentam um alto desempenho
propulsivo e, por isso, o ser humano tem desenvolvido um grande interesse nos estudos
sobre estas temáticas. Desta forma, este trabalho, no âmbito dos perfis oscilantes, teve
por base a visualização, bidimensional, das esteiras libertadas por um perfil NACA0012
sujeito a um movimento puramente vertical, periódico, não sinusoidal, simétrico e
assimétrico, a diferentes combinações de velocidade, amplitude e frequência. Os
resultados permitiram concluir que o surgimento de VBAs, assim como o tipo de esteira
libertada por um perfil oscilante, dependem essencialmente dos parâmetros h e k.
Contudo, a influência de cada parâmetro nunca é independente, sendo que os
parâmetros apenas ditam a tendência do tipo de estruturas libertadas pelo perfil, mas,
de forma isolada, não são capazes de afirmar essa mesma tendência.
Biomimetics is an area of science dedicated to the study of nature, based on its imitation. The flapping airfoils, in nature, show high propulsive performance and, therefore, the human being has developed a great interest in studying these themes. Thus, this work, within the scope of flapping airfoils, was based on the two-dimensional visualization of the wakes created by a NACA0012 airfoil, subjected to a periodic, non-sinusoidal, symmetric and asymmetric plunging motion, at different combinations of wind speed, amplitude and frequency. The results show that the appearance of LEVs, as well as the type of wake release by a flapping airfoil, depends essentially on the parameters h and k. However, the influence of each parameter is not independent, since the parameters only dictate the tendency of the type of structure released by the airfoil, but they cannot state that same tendency in an isolated way.
Biomimetics is an area of science dedicated to the study of nature, based on its imitation. The flapping airfoils, in nature, show high propulsive performance and, therefore, the human being has developed a great interest in studying these themes. Thus, this work, within the scope of flapping airfoils, was based on the two-dimensional visualization of the wakes created by a NACA0012 airfoil, subjected to a periodic, non-sinusoidal, symmetric and asymmetric plunging motion, at different combinations of wind speed, amplitude and frequency. The results show that the appearance of LEVs, as well as the type of wake release by a flapping airfoil, depends essentially on the parameters h and k. However, the influence of each parameter is not independent, since the parameters only dictate the tendency of the type of structure released by the airfoil, but they cannot state that same tendency in an isolated way.
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Keywords
Biomimética Esteira Perfis Oscilantes Vba Vbf