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Jet thrust vectoring using a miniature fluidic oscillator

Published online by Cambridge University Press:  03 February 2016

G. Raman
Affiliation:
Dept of Mechanical, Materials and Aerospace Engineering, Illinois Institute of Technology, Chicago, USA
S. Packiarajan
Affiliation:
Dept of Mechanical, Materials and Aerospace Engineering, Illinois Institute of Technology, Chicago, USA
G. Papadopoulos
Affiliation:
Dantec Dynamics, Ramsey, NJ, USA
C. Weissman
Affiliation:
Dantec Dynamics, Ramsey, NJ, USA
S. Raghu
Affiliation:
Advanced Fluidics, Ellicot City, MD, USA

Abstract

This paper presents a new approach to vectoring jet thrust using a miniature fluidic actuator that provided spatially distributed mass addition. The fluidic actuators used had no moving parts and produced oscillatory flow with a square wave form at frequencies up to 1·6kHz. A subsonic jet with an exit diameter of 3·81cm was controlled using single and dual fluidic actuators, each with an equivalent circular diameter of 1·06mm. The fluidic nozzle was operated at pressures between 20·68 and 165·47kPa. The objectives of the present work included documentation of the actuation characteristics of fluidic devices, assessment of the effectiveness of fluidic devices for jet thrust vectoring, and evaluation of mass flow requirements for vectoring under various conditions. Measurements were made in the flow field using a pitot probe for the vectored and unvectored cases. Some acoustic measurements were made using microphones in the near-field and for selected cases particle image velocimetry (PIV) measurements were made. Thrust vectoring was obtained in low speed jets by momentum effects with fluidic device mass flow rates of only 2 × 10–4kg/sec (0·6% of main jet mass flow per fluidic oscillator). Although a single fluidic device produced vectoring of the primary jet, the dual fluidic device configuration (with two fluidic devices on either side of the jet exit) produced mass flux enhancement of 28% with no vectoring. Our results indicate that fluidic actuators have the potential for use in thrust vectoring, flow mixing and industrial flow deflection applications.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society 2005 

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References

1. Van der Veer, M. and Strykowski, P.J.. Counterflow thrust vector control of subsonic jets: continuous and bistable regimes, J Propulsion and Power, May-June 1997, 13, (3).Google Scholar
2. Smith, B.L. and Glezer, A.. Vectoring and small-scale motions effected in free shear flows using synthetic jet actuators, 1997, AIAA Paper 97-0213.Google Scholar
3. Miller, D.N., Yagle, P.J. and Hamstra, J.W.. Fluidic throat skewing for thrust vectoring in fixed geometry nozzles, 1999, AIAA Paper 99-0365.Google Scholar
4. Mason, M.S. and Crowther, W.J.. Fluidic thrust vectoring of low observable aircraft, 2002, CEAS Aerospace Aerodynamic Research Conference, Cambridge, UK, 10-12 June 2002.Google Scholar
5. Morris, N.M., An Introduction to Fluid Logic, 1973 McGraw Hill, UK.Google Scholar
6. Viets, H.. Flip-flop jet nozzle, AIAA J, 1975, 13, pp 13751379.Google Scholar
7. Raman, G., Hailye, M. and Rice, E.J.. Flip-flop jet nozzle extended to supersonic flows, AIAA J, 1993, 31, pp 10281035.Google Scholar
8. Raman, G., Rice, E.J. and Cornelius, D.. Evaluation of flip-flop jet nozzles for use as practical excitation devices, J Fluids Eng, 1994, 116, pp 508515.Google Scholar
9. Raman, G. and Cornelius, D.. Jet mixing control using excitation from miniature oscillating jets, AIAA J, 1995, 33, pp 365368.Google Scholar
10. Raman, G. and Cornelius, D.. Multiple fluidic devices provide flow-mixing control, 1996, NASA Tech Briefs, Oct 1996, 20, pp 9192.Google Scholar
11. Raman, G.. 1997 Using controlled unsteady fluid mass addition to enhance jet mixing, AIAA J, 35, pp 647656.Google Scholar
12. Raman, G., Raghu, S. and Bencic, T.J.. Cavity resonance suppression using miniature fluidic oscillators, 1999, AIAA Paper 99-1900.Google Scholar
13. Stouffer, R.D.. 1985 Liquid oscillator device, US Patent 4508267.Google Scholar
14. Raghu, S. and Raman, G.. Miniature fluidic devices for flow control, 1999, ASME FEDSM 99-7256.Google Scholar
15. Raghu, S.. Feedback-free fluidic oscillator, 2001, US Patent 6253782.Google Scholar
16. Gregory, J.W., Sullivan, J.P., Raman, G. and Raghu, S.. Characterization of a micro fluidic oscillator for flow control, 2004 AIAA Paper 2004-2692.Google Scholar
17. Sakaue, H., Gregory, J.W., Sullivan, J.P. and Raghu, S.. Porous pressure sensitive paint for unsteady flow details, 2001, AIAA paper 2001-0554.Google Scholar
18. Madsen, A.H. and McCluskey, D.R.. On the accuracy and reliability of PIV measurements, 1994, Seventh International Symposium on the Application of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 11-14 July 1994.Google Scholar