Thrust enhancement of a flapping airfoil using a non-sinusoidal motion trajectories
| Autor: | S. Hanchi, M. Mekadem, Hamid Oualli, Taha Chettibi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Airfoil 0209 industrial biotechnology Lift coefficient Mechanical Engineering Applied Mathematics Flatness (systems theory) General Engineering Aerospace Engineering Thrust 02 engineering and technology Mechanics Industrial and Manufacturing Engineering Lift (force) 020901 industrial engineering & automation Amplitude Automotive Engineering Flapping Propulsive efficiency |
| Zdroj: | Journal of the Brazilian Society of Mechanical Sciences and Engineering. 43 |
| ISSN: | 1806-3691 1678-5878 |
| Popis: | A parametric numerical study is conducted to assess the effect of trajectory nature on the propulsive performances of a NACA0014 flapping airfoil. Sinusoidal and non-sinusoidal plunging and pitching trajectories are combined to achieve sought flapping trajectories. To this aim, the effect of kinematic parameters such as oscillation frequency, plunging amplitude, pitching amplitude, and phase angle between pitch and plunge is evaluated on thrust and propulsive efficiency behavior at a low Reynolds number, $$Re=1.1$$ x $$ 10^4$$ . It is found that the best propulsive efficiency is obtained for sinusoidal paths, while non-sinusoidal ones are found to slightly improve thrust and lift forces. Furthermore, thrust coefficient maximum values are obtained for non-sinusoidal trajectories when flatness coefficients $$S>1$$ . The highest lift coefficient values are found however for flapping trajectories when flatness coefficients $$S |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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