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Advisor(s)
Abstract(s)
As mudanças significativas das condições de voo aliadas a múltiplos pontos de projecto fixos comprometem o desempenho de uma aeronave. A aplicação da tecnologia de asa adaptativa permite explorar integralmente o potencial do escoamento em cada ponto do envelope de voo.
Este trabalho apresenta o desenvolvimento de um flape contínuo aplicando o conceito de Rotating Rib (RR). Este flape não possui qualquer descontinuidade na superfície da asa e a curvatura da asa é alterada numa linha de articulação comum. A diferença reside no facto de o revestimento da asa não ser interrompido na zona da articulação mas flectir para acompanhar a rotação da nervura interna. Desta forma, o arrasto parasita que resulta da presença da fenda deixa de existir, pelo que a asa fica aerodinamicamente mais limpa. De forma a obter validação funcional e aerodinâmica do conceito adoptado, procedeu-se à implementação e ensaio aerodinâmico do mecanismo. Estes resultados aerodinâmicos são comparados com um flape convencional equivalente para quantificar as vantagens do novo conceito.
Significant changes of flight conditions during a typical mission accounted by multiple, but fixed design points, compromise aircraft performance. Applying adaptive wing technology allows the fully exploration of the flow potential at each point of the flight envelope. This work presents the development of a continuous flap applying the Rotating Rib (RR) concept. This flap has no discontinuity in the wing surface and the camber of the wing is modified in a typical hinge line. The difference is that the skin of the wing is not interrupted in the zone of the hinge but it bends to follow the rotation of the internal ribs. In doing such, the parasite drag, that result due to the presence of the gap, no longer exists thus producing an aerodynamically cleaner wing. In order to obtain the functional and aerodynamic validation of the adopted concept, the implementation and aerodynamic testing of a mechanism are performed. These aerodynamic results are compared with an equivalent conventional flap to quantify the new concept advantages.
Significant changes of flight conditions during a typical mission accounted by multiple, but fixed design points, compromise aircraft performance. Applying adaptive wing technology allows the fully exploration of the flow potential at each point of the flight envelope. This work presents the development of a continuous flap applying the Rotating Rib (RR) concept. This flap has no discontinuity in the wing surface and the camber of the wing is modified in a typical hinge line. The difference is that the skin of the wing is not interrupted in the zone of the hinge but it bends to follow the rotation of the internal ribs. In doing such, the parasite drag, that result due to the presence of the gap, no longer exists thus producing an aerodynamically cleaner wing. In order to obtain the functional and aerodynamic validation of the adopted concept, the implementation and aerodynamic testing of a mechanism are performed. These aerodynamic results are compared with an equivalent conventional flap to quantify the new concept advantages.
Description
Keywords
Flape contínuo - Rotating rib Flape contínuo - Controlo do escoamento Asa adaptativa - Aeronáutica