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Flow control with active dimples

Published online by Cambridge University Press:  03 February 2016

S. Dearing ,
S. Lambert  and
J. Morrison
S. Dearing
Affiliation:
Dept of Aeronautics, Imperial College, London, UK
S. Lambert
Affiliation:
Dept of Aeronautics, Imperial College, London, UK
J. Morrison
Affiliation:
Dept of Aeronautics, Imperial College, London, UK
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Abstract

The long-term goal is to design and manufacture optimal ‘on-demand’ vortex generators, ‘dimples’ that can produce vortices of prescribed strength and duration for the real-time control of aerodynamic flows that are either undergoing transition or are fully turbulent, attached or separating. Electro-active polymers (EAP) are ideal for a dimple control surface, offering high strain rate, fast response, and high electromechanical efficiency. EAP can also be used as the basis of a resistanc – or capacitance – change pressure sensor, development of which has just begun. In terms of manufacture, inkjet printing of EAP also offers a paradigm shift such that a monolithic control surface is a very real possibility. Important features for integration into a control system are robustness and a predictable, repeatable motion. With these objectives in mind, the suitability of EAP-based actuators is assessed both mechanically and aerodynamically. The ultimate goal is to integrate these devices, along with shear-stress and pressure sensors and distributed control, also under development, into a flexible ‘smart skin’ which could be incorporated into an airframe structure. The response of a laminar boundary layer to forcing is investiagted using mechanical dimples.

Type
Research Article
Information
The Aeronautical Journal , Volume 111 , Issue 1125 , November 2007 , pp. 705 - 714
Copyright
Copyright © Royal Aeronautical Society 2007 

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References

1. Wadsworth, D.C., Muntz, E.P., Blackwelder, R.F and Shiflett, G.R.. Transient Energy Release Pressure Driven Microactuators for control of Wall-Bounded Turbulent Flows, AIAA-93-3271, AIAA Shear Flow Conference, 6-9 July, 1993, Orlando, FL, USA.Google Scholar
2. Bar-Cohen, Y.. Electroactive Polymer (EAP) Actuators as Artificial Muscles. Reality, Potential and Challenges, SPIE Press, 2004, Bellingham, Washington, USA.Google Scholar
3. Lambert, S., McKeon, B.J., Koberg, W.H. and Morrison, J.F.. Fundamental Studies of Active Dimples, Turbulent Shear Flow Phenomena-4, Williamsburg, 2005, pp 283 – 288.Google Scholar
4. Lambert, S. and Morrison, J.F.. Fundamental Studies of Active Dimples, 2006, AIAA-2006-3182.Google Scholar
5. McKeon, B.J., Lambert, S., Sherwin, S.J. and Morrison, J.F.. Active dimples for flow control, Advances in Turbulence X, Proceedings of the 10th European Turbulence Conference, Trondheim. CIMNE, Barcelona, Spain, 2004, Andersson, H. I. and Krogstad, P.-Å., (Eds), pp 581 – 584.Google Scholar
6. Koberg, W.H.. Simulation of Flow Control Using Active Dimples, PhD transfer report, 2006, Department of Aeronautics, Imperial College, London, UK.Google Scholar
7. Gad-El-Hak, M., Flow Control. Passive Active and Reactive Flow Management, 2000, Cambridge University Press.Google Scholar
8. Morrison, J.F., Dearing, S.S., Arthur, G.G., Cui, Z. and McKeon, B.J.. Fluid flow control using boundary layer control. International Patent Publication, 2006, WO 2006/040532 A1.Google Scholar
9. Arthur, G.G., McKeon, B.J., Dearing, S.S., Morrison, J.F. and Cui, Z.. Manufacture of micro-sensors and actuators for flow control, Microelectronic Engng, 2006, 83, pp 1205 – 1208.Google Scholar
10. Sirringhaus, H., Kawase, T., Friend, R.H., Shimoda, T., Inbasekaran, M., Wu, W. and Woo, E.P.. High-resolution inkjet printing of all-polymer transistor circuits. Science, 290, 2000, pp 2123–2126.Google Scholar
11. Lighthill, M.J., Introduction. Boundary Layer Theory. In: Laminar Boundary Layers, Rosenhead, L. (Ed), Clarendon Press, Oxford, UK, 1963.Google Scholar
12. Wu, J.Z. and Wu, J.M.. Vorticity dynamics on boundaries, Adv. in Appl Mech, 1996, 32, pp 119–275.Google Scholar
13. Wu, J.Z., Wu, X.H. and Wu, J.M.. Streaming vorticity flux from oscillating walls with finite amplitude, Phys Fluids, 1993, 5, (8), pp 1933–1938.Google Scholar
14. Panton, R.L., Incompresssible Flow, 3rd Ed, 2005, Wiley and Sons, Hoboken, New Jersey, USA.Google Scholar
15. Hedyt, R., Kornbluh, R., Pelrine, R. and Mason, V.. Design and performance of an electrostrictive polymer-film acoustic actuator, J Sound and Vibration, 1998, 2152, pp 297–311.Google Scholar
16. Pelrine, R., Kornbluh, R., Joseph, J., Heydt, R., Pei, Q. and Chiba, S.. 2000 High-field deformation of elastomeric dielectric actuators, Materials Science and Engineering C11 89-100, 2000.Google Scholar
17. Lee, S., Jung, K., Koo, J., Lee, S., Choi, H., Jeon, J., Nam, J. and Choi, H.. Braille display device using soft actuator. Proc SPIE Int Soc Opt Eng, 2004, 5385, 368.Google Scholar
18. Pimpin, A., Suzuki, Y. and Kasagi, N.. Micro electrostrictive actuator with metal compliant electrodes for flow control applications, 17th IEEE Int Confw MEMS, 2004, Maastrict, Netherlands, pp 478–481.Google Scholar
19. Williams, J.G., Stress Analysis of Polymers, Ellis Horwood Series in Engineering Science, 1980, 2nd ed.Google Scholar