Vortex mode bifurcation and lift force of a plunging airfoil at low Reynolds numbers

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Volumn , Issue , 2010, Pages

  Cleaver, D J ^a   Wang, Z ^a   Gursul, I ^a  

^a University of Bath   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

AIRFOILS; ANGLE OF ATTACK; BIFURCATION (MATHEMATICS); FLOW FIELDS; LIFT; REYNOLDS NUMBER; VELOCITY MEASUREMENT;

ANGLES OF ATTACK; INITIAL CONDITIONS; LEADING-EDGE VORTICES; LIFT COEFFICIENT; LOW REYNOLDS NUMBER; PARTICLE IMAGE VELOCIMETRY MEASUREMENT; PLUNGING AIRFOIL; SMALL AMPLITUDE;

VORTEX FLOW;

EID: 77955919362     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.2514/6.2010-390     Document Type: Conference Paper

References (30)

1. Ho, S., Nassef, H., Pornsinsirirak, N., Tai, Y.C., and Ho, CM., "Unsteady Aerodynamics and Flow Control for Flapping Wing Flyers," Progress in Aerospace Sciences, Vol. 39, No. 8, 2003, pp. 635-681.
2. Shyy, W., Berg, M., and Ljungqvist, D., "Flapping and Flexible Wings for Biological and Micro Air Vehicles," Progress in Aerospace Sciences, Vol. 35, No. 5, 1999, pp. 455-505.
3. Pines, DJ., and Bohorquez, F., "Challenges Facing Future Micro-Air-Vehicle Development," Journal ofAircraft, Vol. 43, No. 2, 2006, pp. 290-305.
4. Ellington, C.P., vandenBerg, C., Willmott, A.P., and Thomas, A.L.R., "Leading-Edge Vortices in Insect Flight," Nature, Vol. 384, No. 6610, 1996, pp. 626-630.
5. Liu, H., Ellington, C.P., Kawachi, K., Van den Berg, C., and Willmott, A.P., "A Computational Fluid Dynamic Study of Hawkmoth Hovering," Journal of Experimental Biology, Vol. 201, No. 4, 1998, pp. 461-477.
6. Miller, L.A., and Peskin, C.S., "When Vortices Stick: An Aerodynamic Transition in Tiny Insect Flight," Journal of Experimental Biology, Vol. 207, No. 17, 2004, pp. 3073-3088.
7. Birch, J.M., and Dickinson, M.H., "The Influence of Wing-Wake Interactions on the Production of Aerodynamic Forces in Flapping Flight," Journal of Experimental Biology, Vol. 206, No. 13, 2003, pp. 2257-2272.
8. Gursul, I., Gordnier, R., and Visbal, M., "Unsteady Aerodynamics of Nonslender Delta Wings," Progress in Aerospace Sciences, Vol. 41, No. 7, 2005, pp. 515-557. (Pubitemid 41817298)
9. Taylor, G., Wang, Z., Vardaki, E., and Gursul, I., "Lift Enhancement over Flexible Nonslender Delta Wings," AIAA Journal, Vol. 45, No. 12, 2007, pp. 2979-2993.
10. Cleaver, DJ., Wang, Z.J., and Gursul, I. "Lift Enhancement on Oscillating Airfoils," 39th AIAA Fluid Dynamics Conference, AIAA-2009-4028, AIAA, 2009.
11. Visbal, M.R., "High-Fidelity Simulation of Transitional Flows Past a Plunging Airfoil," AIAA Journal, Vol. 47, No. 11, 2009, pp. 2685-2697.
12. Cleaver, DJ., Wang, Z.J., and Gursul, I. "Delay of Stall by Small Amplitude Airfoil Oscillation at Low Reynolds Numbers," 47th AIAA Aerospace Sciences Meeting, AIAA 2009-392, AIAA, 2009.
13. Jones, K.D., Dohring, C.M., and Platzer, M.F., "Experimental and Computational Investigation of the Knoller-Betz Effect," AIAA Journal, Vol. 36, No. 7, 1998, pp. 1240-1246.
14. Lewin, G.C., and Haj-Hariri, H., "Modelling Thrust Generation of a Two-Dimensional Heaving Airfoil in a Viscous Flow," Journal of Fluid Mechanics, Vol. 492, 2003, pp. 339-362.
15. Heathcote, S., and Gursul, I., "Jet Switching Phenomenon for a Periodically Plunging Airfoil," Physics of Fluids, Vol. 19, No. 2, 2007.
16. von Ellenrieder, K.D., and Pothos, S., "Piv Measurements of the Asymmetric Wake of a Two Dimensional Heaving Hydrofoil," Experiments in Fluids, Vol. 44, No. 5, 2008, pp. 733-745.
17. Godoy-Diana, R., Marais, C., Aider, J.L., and Wesfreid, J.E., "A Model for the Symmetry Breaking of the Reverse Benard-Von Karman Vortex Street Produced by a Flapping Foil," Journal of Fluid Mechanics, Vol. 622, 2009, pp. 23-32.
18. Moffat, R.J., "Using Uncertainty Analysis in the Planning of an Experiment," Journal of Fluids Engineering-Transactions of the ASME, Vol. 107, No. 2, 1985, pp. 173-178.
19. Heathcote, S. "Flexible Flapping Airfoil Propulsion at Low Reynolds Numbers," Ph.D. Dissertation, Dept of Mechanical Engineering, University of Bath, Bath, 2006.
20. Frampton, K.D., Goldfarb, M., Monopoli, D., and Cveticanin, D. "Passive Aeroelastic Tailoring for Optimal Flapping Wings," Proceedings of Conference on Fixed, Flapping and Rotary Wing Vehicles at Very Low Reynolds Numbers, 2000, pp. 473-482.
21. Graftieaux, L., Michard, M., and Grosjean, N., "Combining Piv, Pod and Vortex Identification Algorithms for the Study of Unsteady Turbulent Swirling Flows," Measurement Science & Technology, Vol. 12, No. 9, 2001, pp. 1422-1429.
22. Morgan, C.E., Babinsky, H., and Harvey, J.K. "Vortex Detection Methods for Use with Piv and Cfd Data," 47th AIAA Aerospace Sciences Meeting, AIAA-2009-74, AIAA, 2009.
23. Sunada, S., Sakaguchi, A., and Kawachi, K., "Airfoil Section Characteristics at a Low Reynolds Number," Journal of Fluids Engineering-Transactions of the ASME, Vol. 119, No. 1, 1997, pp. 129-135.
24. Schluter, J.U. "Lift Enhancement at Low Reynolds Numbers Using Pop-up Feathers," 39th AIAA Fluid Dynamics Conference, AIAA-2009-4195, AIAA, 2009.
25. Huang, R.F., and Lin, C.L., "Vortex Shedding and Shear-Layer Instability of Wing at Low-Reynolds Numbers," AIAA Journal, Vol. 33, No. 8, 1995, pp. 1398-1403.
26. th ed., The Macmillan Press Ltd, London, 1968.
27. Rival, D., Prangemeier, T., and Tropea, C., "The Influence of Airfoil Kinematics on the Formation of Leading-Edge Vortices in Bio-Inspired Flight," Experiments in Fluids, Vol. 46, No. 5, 2009, pp. 823-833.
28. Milano, M., and Gharib, M., "Uncovering the Physics of Flapping Flat Plates with Artificial Evolution," Journal of Fluid Mechanics, Vol. 534, 2005, pp. 403-409.
29. Dabiri, J.O., "Optimal Vortex Formation as a Unifying Principle in Biological Propulsion," Annual Review of Fluid Mechanics, Vol. 41, 2009, pp. 17-33.
30. Ringuettet, M.J., Milano, M., and Gharib, M., "Role of the Tip Vortex in the Force Generation of Low-Aspect-Ratio Normal Flat Plates," Journal of Fluid Mechanics, Vol. 581, 2007, pp. 453-468.