Banca de DEFESA: FELIPE DA SILVA PONTES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FELIPE DA SILVA PONTES
DATE: 18/11/2020
TIME: 09:00
LOCAL: Virtual
TITLE:

Wing rock phenomenon in orthotropic plates

KEY WORDS:

wing rock; orthotropic plates; Strouhal number

PAGES: 132
BIG AREA: Engenharias
AREA: Engenharia Aeroespacial
SUBÁREA: Aerodinâmica
SPECIALTY: Aerodinâmica de Aeronaves Espaciais
SUMMARY:

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 with a high angle of attack. Flight instabilities caused by rotational oscillations by 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. The composite material plates were produced with unidirectional fibers and were positioned with the fibers oriented at 0° or 90° in relation to the air flow direction. The studied parameters were the Strouhal number, the variation of the rolling angle, the 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 that the composite with fibers oriented at 90° of the flow with an aspect ratio of 3.25, in relation to aluminum, indicates excellent damping properties of moment parallel to the direction of the fibers and achieves frequency values induced by vortexes smaller when the angle of attack increases.

BANKING MEMBERS:
Presidente - 1202134 - JOSE DANIEL DINIZ MELO
Externo ao Programa - 2654020 - KLEIBER LIMA DE BESSA
Externo à Instituição - RÔMULO PIERRE BATISTA DOS REIS - UFERSA