Numerical and Experimental Study of a Plunging Airfoil

Lopes, Rodolfo; Camacho, Emanuel A.; Neves, Fernando M. S. P.; Silva, André R.; Barata, Jorge M. M.

doi:10.1615/tfec2019.tfl.028428

Cited by 2 publications

(2 citation statements)

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“…Firstly, the Reynolds-averaged Navier-Stokes (RANS) equations are selected as the governing equations, due to the unsteadiness of the current problem and the inherent turbulent phenomena seen in nature. The continuity and momentum averaged equations are written in a Cartesian tensor form as (e.g., ANSYS [34] or Lopes et al [35]):…”

Section: Methodsmentioning

confidence: 99%

“…In the turbulence modeling field, some authors have studied the effectiveness of some turbulent models in representing the flow characteristics, but at the same time, some of the published research from other authors assumes the flow around flapping airfoils to be laminar. The Shear-Stress Transport k − ω model was selected to access its capability in predicting the flow surrounding a plunging airfoil since it shows a superior capability in representing the flow surrounding oscillatory airfoils [35].…”

Section: Methodsmentioning

confidence: 99%

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Numerical Investigation of Frequency and Amplitude Influence on a Plunging NACA0012

et al. 2020

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Natural flight has always been the source of imagination for Mankind, but reproducing the propulsive systems used by animals that can improve the versatility and response at low Reynolds number is indeed quite complex. The main objective of the present work is the computational study of the influence of the Reynolds number, frequency, and amplitude of the oscillatory movement of a NACA0012 airfoil in the aerodynamic performance. The thrust and power coefficients are obtained which together are used to calculate the propulsive efficiency. The simulations were performed using ANSYS Fluent with a RANS approach for Reynolds numbers between 8500 and 34,000, reduced frequencies between 1 and 5, and Strouhal numbers from 0.1 to 0.4. The aerodynamic parameters were thoroughly explored as well as their interaction, concluding that when the Reynolds number is increased, the optimal propulsive efficiency occurs for higher nondimensional amplitudes and lower reduced frequencies, agreeing in some ways with the phenomena observed in the animal kingdom.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%