Effect of the Extended Rigid Flapping Trailing Edge Fringe on an S833 Airfoil
Source abstract
Abstract
A 2D numerical simulation was conducted to investigate the effect of an extended rigid trailing edge fringe with a flapping motion on the S833 airfoil and its wake flow field, as an analogy of an owl’s wing. This study aims to characterize the influence of the extended flapping fringe on the aerodynamic performance and the wake flow characteristics downstream of the airfoil. The length (Le) and flapping frequencies (fe) of the fringe are the key parameters that dominate the impact on the airfoil and the flow field, given that the oscillation angular amplitude is fixed at 5°. The simulation results demonstrated that the airfoil with an extended fringe of 10% of the chord at a flapping frequency of fe = 110 Hz showed a substantial effect on the pressure distribution on the airfoil and the flow characteristics downstream of the airfoil. An irregular vortex street was predicted downstream, thus causing attenuations of the vorticities, and shorter streamwise gaps between each pair of vortices. The extended flapping fringe at a lower frequency than the natural shedding vortex frequency can effectively break the large vortex structure up into smaller scales, thus leading to an accelerated attenuation of vorticities in the wake.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Fluid Dynamics and Turbulent Flows · Aerodynamics and Acoustics in Jet Flows · Wind and Air Flow Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical and Materials Engineering, Wright State University, Dayton, OH 45435, USA
References (28)
Show source-provided references
1. Optimal design of aeroacoustic airfoils with owl-inspired trailing edge serrations10.1088/1748-3190/ac03bd ↗
2. Reduction of wind turbine noise using optimized airfoils and trailing-edge serrations10.2514/1.38888 ↗
3. Effect of trailing-edge serrations on noise reduction in a coupled bionic aerofoil inspired by barn owls10.1088/1748-3190/ab529e ↗
4. A parametric study of the effect of self-oscillating trailing-edge flaplets on aerofoil self-noise10.1016/j.apacoust.2020.107907 ↗
5. Dynamic stall control on flapping wing airfoils10.1016/j.ast.2016.12.008 ↗
6. Aerodynamic performance of owl-like airfoil undergoing bio-inspired flapping kinematics10.1016/j.cja.2020.10.017 ↗
7. Noise-reduction mechanism of a flat-plate serrated trailing edge10.2514/1.J052436 ↗
8. Winzen, A., Klaas, M., and Schröder, W. (2014, January 7–10). PIV measurements comparing natural and model owl wings. Proceedings of the 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal.
9. Winzen, A., Klän, S., Klaas, M., and Schröder, W. (2012). Flow field analysis and contour detection of a natural owl wing using PIV measurements. Nature-Inspired Fluid Mechanics, Springer.10.1007/978-3-642-28302-4_7 ↗
10. Lilley, G. (1998, January 2–4). A study of the silent flight of the owl. Proceedings of the 4th AIAA/CEAS Aeroacoustics Conference, Toulouse, France.10.2514/6.1998-2340 ↗
11. Silent owl flight: Bird flyover noise measurements10.2514/1.J050703 ↗
12. Vortex generators used to control laminar separation bubbles10.2514/3.46336 ↗
13. Klan, S., Bachmann, T., Klaas, M., Wagner, H., and Schröder, W. (2010). Experimental analysis of the flow field over a novel owl based airfoil. Animal Locomotion, Springer.10.1007/978-3-642-11633-9_32 ↗
14. Effect of flexure on aerodynamic propulsive efficiency of flapping flexible airfoil10.1016/j.jfluidstructs.2005.11.004 ↗
15. Numerical study of passive and active flow separation control over a NACA0012 airfoil10.1016/j.compfluid.2007.10.010 ↗
16. Veldhuis, L.L.M., Jansen, D.P., El Haddar, J., and Correale, G. (2012, January 23–28). Novel Passive and Active Flow Control for High Lift. Proceedings of the 28th International Congress Aeronautucal Science, Brisbane, Australia.
17. Finez, A., Jacob, M., Jondeau, E., and Roger, M. (2010, January 7–9). Broadband noise reduction with trailing edge brushes. Proceedings of the 16th AIAA/CEAS Aeroacoustics Conference, Stockholm, Sweden.10.2514/6.2010-3980 ↗
18. Experimental Investigations in Low-Noise Trailing Edge Design10.2514/1.11101 ↗
19. Das, C. (2021, October 10). An Experimental Investigation of Flow-Induced Noise Mechanism of a Flexible Flat-Plate Trailing-Edge. Available online: https://www.semanticscholar.org/paper/AN-EXPERIMENTAL-INVESTIGATION-OF-FLOW-INDUCED-NOISE-Das-Mimani/6b0724fa4ad87b65336240d253d30b5a3b1c4176#citing-papers.
20. Schlanderer, S.C., and Sandberg, R.D. (2013, January 27–29). DNS of a compliant trailing-edge flow. Proceedings of the 19th AIAA/CEAS Aeroacoustics Conference, Berlin, Germany.10.2514/6.2013-2013 ↗
21. Kamps, L., Brücker, C., Geyer, T.F., and Sarradj, E. (2017, January 5–9). Airfoil self noise reduction at low Reynolds numbers using a passive flexible trailing edge. Proceedings of the 23rd AIAA/CEAS Aeroacoustics Conference, Denver, CO, USA.10.2514/6.2017-3496 ↗
22. An aeroacoustic investigation into the effect of self-oscillating trailing edge flaplets10.1016/j.jfluidstructs.2019.02.014 ↗
23. Flexible flaps inspired by avian feathers can enhance aerodynamic robustness in low Reynolds number airfoils10.3389/fbioe.2021.612182 ↗
24. Yang, Z., He, Z., and Chen, F. (2015, January 5–9). Study on the Vortex Wake of an Airfoil Equipped with Flexible Trailing Edge Fringe. Proceedings of the 53rd AIAA Aerospace Sciences Meeting, Kissimmee, FL, USA.10.2514/6.2015-1707 ↗
25. A numerical simulation on the airfoil s833 equipped with flapping trailing edge fringes10.29252/jafm.13.02.30034 ↗
26. Somers, D.M. (2005). S833, S834, and S835 Airfoils: November 2001–November 2002, National Renewable Energy Lab. (NREL).10.2172/15020040 ↗
27. A new model for boundary layer transition using a single-point RANS approach10.1115/1.1622709 ↗
28. A three-equation eddy-viscosity model for Reynolds-averaged Navier–Stokes simulations of transitional flow10.1115/1.2979230 ↗