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Communication Dans Un Congrès Année : 2020

Propulsive Performance for an Oscillating Airfoil Applied to Mini Air Vehicles

Résumé

In the present work, the optimal control to maximize the energy harvesting through a sinusoidal vertical gust profile is investigated through 2D URANS simulations and wind tunnel tests of NACA 0015 wing. The control is defined by a harmonic pitching motion of the wing, with the main objective to determine the optimal control parameters represented by the optimal pitch amplitude and phase shift that maximize the energy harvesting efficiency. The computational fluid dynamics (CFD) based on the k-omega -SST turbulence model is implemented to find the optimal control parameters for a simultaneously heaving and pitching 2D wing. For the experimental investigation, a wind tunnel model is manufactured and used to perform the wind tunnel tests to prove the energy harvesting concept and validate the obtained CFD results. Since it wasn't feasible to generate sinusoidal vertical gust in the wind tunnel, the gust effect is modeled by a sinusoidal heaving motion of the wing. A robotic arm is used to perform the simultaneous heaving and pitching motions of the wing. The numerical results showed the significant effect of the control activation to increase the energy harvesting where an optimal efficiency of 67 % is achieved at a gust amplitude of 0,5 m/s and frequency of 0,4 Hz. It was also found that an increase in the amplitude of the sinusoidal gust profile brings significant increment in the amount of energy harvested. Wind tunnel tests proved the concept of energy harvesting and exhibit the same trends of efficiency variation with pitch amplitude as that obtained through the numerical simulations. The obtained results showed that the energy harvesting flight technique is very promising regarding the improvement of the performance of mini-UAVs.
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Dates et versions

hal-03391375 , version 1 (21-10-2021)

Identifiants

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Nikola Gavrilovic, Hesham Gaballa, Valérie Ferrand, Jean-Marc Moschetta. Propulsive Performance for an Oscillating Airfoil Applied to Mini Air Vehicles. AIAA AVIATION 2020 FORUM, Jun 2020, Virtual event, United States. pp.1-18, ⟨10.2514/6.2020-2686⟩. ⟨hal-03391375⟩
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