Fenômeno de wing rock em placas ortotrópicas

The wing rock phenomenon is characterized by an undesirable rotational oscillation in aircrafts, mainly in roll axis, which occurs at relatively low flight speeds and high angle of attack. Flight instabilities caused by rotational oscillations of the wing rock phenomenon can affect aircraft perfo...

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Autor principal: Pontes, Felipe da Silva
Outros Autores: Melo, José Daniel Diniz
Formato: Dissertação
Idioma:pt_BR
Publicado em: Universidade Federal do Rio Grande do Norte
Assuntos:
Wing rock
Compósitos
Strouhal
Endereço do item:https://repositorio.ufrn.br/handle/123456789/31366
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spelling ri-123456789-313662021-02-07T08:26:28Z Fenômeno de wing rock em placas ortotrópicas Wing rock phenomenon in orthotropic plates Pontes, Felipe da Silva Melo, José Daniel Diniz http://lattes.cnpq.br/5423265219116795 http://lattes.cnpq.br/6572298923055649 Bessa, Kleiber Lima de http://lattes.cnpq.br/3825553608740400 Reis, Rômulo Pierre Batista dos http://lattes.cnpq.br/1366749248543749 Wing rock Compósitos Strouhal The wing rock phenomenon is characterized by an undesirable rotational oscillation in aircrafts, mainly in roll axis, which occurs at relatively low flight speeds and high angle of attack. Flight instabilities caused by rotational oscillations of the wing rock phenomenon can affect aircraft performance and flight control. In the present work, the wing rock phenomenon is studied in rectangular orthotropic plates of composite materials with several elongations. The experiments were performed in a wind tunnel with a wind speed of 6 m/s. Composite material plates were produced with unidirectional fibers and were positioned with the fibers oriented at 0° or 90° with respect to the air flow direction. The parameters studied were Strouhal number, variation of the rolling angle, plate deformation and the influence of the fiber orientation on the wing rock phenomenon. The results obtained with composite material plates were compared with results obtained in aluminum plates with the same elongation. It was observed for the composite plates with fibers oriented at 90° of the flow direction, with aspect ratio of 3.25, a reduction in vibrations induced by vortices as the angle of attack increases, as compared to aluminum plates. O fenômeno wing rock é caracterizado por uma oscilação rotacional indesejável em aeronaves, principalmente no eixo de rotação, que ocorre em velocidades de voo relativamente baixas e alto ângulo de ataque. As instabilidades de voo causadas por oscilações rotacionais do fenômeno wing rock podem afetar o desempenho da aeronave e o controle de voo. No presente trabalho, o fenômeno do wing rock é estudado em placas retangulares ortotrópicas de materiais compósitos com diversas razões de aspecto. Os experimentos foram realizados em um túnel de vento com velocidade do vento de 6 m/s. As placas de material compósito foram produzidas com fibras unidirecionais e posicionadas com as fibras orientadas a 0 ° ou 90 ° em relação à direção do fluxo de ar. Os parâmetros estudados foram número de Strouhal, variação do ângulo de rolagem, deformação da placa e a influência da orientação da fibra no fenômeno do wing rock. Os resultados obtidos com placas de material compósito foram comparados com resultados obtidos em placas de alumínio com mesma razão de aspecto. Observou-se para as placas compostas com fibras orientadas a 90° da direção do fluxo, com razão de aspecto de 3,25, redução das vibrações induzidas por vórtices com o aumento do ângulo de ataque, em comparação às placas de alumínio. 2021-02-03T17:35:42Z 2021-02-03T17:35:42Z 2020-11-18 masterThesis PONTES, Felipe da Silva. Fenômeno de wing rock em placas ortotrópicas. 2020. 127f. Dissertação (Mestrado em Engenharia Mecânica) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2020. https://repositorio.ufrn.br/handle/123456789/31366 pt_BR Acesso Aberto application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÂNICA
institution Repositório Institucional
collection RI - UFRN
language pt_BR
topic Wing rock
Compósitos
Strouhal
spellingShingle Wing rock
Compósitos
Strouhal
Pontes, Felipe da Silva
Fenômeno de wing rock em placas ortotrópicas
description The wing rock phenomenon is characterized by an undesirable rotational oscillation in aircrafts, mainly in roll axis, which occurs at relatively low flight speeds and high angle of attack. Flight instabilities caused by rotational oscillations of the wing rock phenomenon can affect aircraft performance and flight control. In the present work, the wing rock phenomenon is studied in rectangular orthotropic plates of composite materials with several elongations. The experiments were performed in a wind tunnel with a wind speed of 6 m/s. Composite material plates were produced with unidirectional fibers and were positioned with the fibers oriented at 0° or 90° with respect to the air flow direction. The parameters studied were Strouhal number, variation of the rolling angle, plate deformation and the influence of the fiber orientation on the wing rock phenomenon. The results obtained with composite material plates were compared with results obtained in aluminum plates with the same elongation. It was observed for the composite plates with fibers oriented at 90° of the flow direction, with aspect ratio of 3.25, a reduction in vibrations induced by vortices as the angle of attack increases, as compared to aluminum plates.
author2 Melo, José Daniel Diniz
author_facet Melo, José Daniel Diniz
Pontes, Felipe da Silva
format masterThesis
author Pontes, Felipe da Silva
author_sort Pontes, Felipe da Silva
title Fenômeno de wing rock em placas ortotrópicas
title_short Fenômeno de wing rock em placas ortotrópicas
title_full Fenômeno de wing rock em placas ortotrópicas
title_fullStr Fenômeno de wing rock em placas ortotrópicas
title_full_unstemmed Fenômeno de wing rock em placas ortotrópicas
title_sort fenômeno de wing rock em placas ortotrópicas
publisher Universidade Federal do Rio Grande do Norte
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/31366
work_keys_str_mv AT pontesfelipedasilva fenomenodewingrockemplacasortotropicas
AT pontesfelipedasilva wingrockphenomenoninorthotropicplates
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