On the use of PVDF for morphing wing pressure indicators
Affiliations : 1 - Laboratoire LAPLACE (France), 2 - Institut de mécanique des fluides de Toulouse (France)
The goal of this article is to investigate the possibility to capture the physical effect on the flow via a hybrid piezoelectric-shape memory alloy actuation at high Reynolds numbers using Polyvinylidene fluoride (PVDF) based pressure indicators at the trailing-edge of morphing wing prototype. The aim is to identify both the highand low-frequent turbulent structures using distributed pressure indicators and thereby identify the actuation effect on the flow. To this end the design of the PVDF based pressure indicator as a function of the Reynolds number, desired frequency and maximum attenuation will be described. Following this description of the design the numerical results are presented. Finally the experimental results will be presented and compared to the turbulent structures identified using high-speed Particle Image Velocimetry. It will be shown that the proposed PVDF based pressure indicator is capable of capturing the aerodynamic phenomena on the trailing edge of an airfoil at high Reynolds numbers.