Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Active control of jet mixing

Active control of jet mixing

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Add to cart
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)
Add to cart

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IEE Proceedings - Control Theory and Applications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

IEE
Published

A control law to improve jet flow mixing is presented. The control law employs a pair of actuators at the jet nozzle exit that act on the shear layers near the corners by blowing and subtracting fluid in an anti-symmetric fashion and a sensor downstream or at the nozzle exit with a time delay that measures the pressure difference across the nozzle diameter. A 2-D jet flow is numerically simulated along with massless/mass particles and a passive scalar. The mixing enhancement produced by these controllers is demonstrated visually by snapshots of the vorticity, streaklines, particle distribution and scalar field. Probability function for the particles and the scalar field are constructed, which serve as an index of mixing quality and the effectiveness of the controllers. This closed-loop control law successfully alters the jet flow and improves the mixing of particles with mass and passive scalar.

Inspec keywords: jets; flow control; two-phase flow; probability; closed loop systems; nozzles; delays

Other keywords: vorticity; probability functions; passive scalar; particle distribution; time delays; jet nozzle; jet flow mixing; closed-loop control

Subjects: Statistics; Level, flow and volume control; Other topics in statistics; Control technology and theory (production); Fluid mechanics and aerodynamics (mechanical engineering); Distributed parameter control systems

References

    1. 1)
      • O.M. Aamo , M. Krstić . (2002) Flow control by feedback.
    2. 2)
      • D.R. Miller , E.W. Comings . Static pressure distribution in the free turbulence jet. J. Fluid Mech. , 1 - 16
    3. 3)
    4. 4)
      • H. Schlichting , K. Gersten . (2000) Boundary layer theory.
    5. 5)
      • Freund, J.B., Moin, P.: `Mixing enhancement in jet exhaust using fluidic actuators: direct numerical simulations', Proc. of FEDSM98, ASME, New York, 1998.
    6. 6)
      • B.R. Ramaprian , M.S. Chandrasekhara . LDA measurements in plane turbulent jets. Trans. ASME, I. J. Fluids Eng. , 264 - 271
    7. 7)
      • T.R. Bewley , P. Moin , R. Teman . DNS-based predictive control of turbulence: an optimal benchmark for feedback algorithms. J. Fluid Mech. , 179 - 225
    8. 8)
    9. 9)
      • C.T. Crowe , M. Sommerfeld , Y. Tsuji . (1998) Multiphase flows with droplets and particles.
    10. 10)
    11. 11)
    12. 12)
      • C.O. Paschereit , I. Wygnanski , H.E. Fiedler . Experimental investigation of subhar monic resonance in an axisymmetric jet. J. Fluid Mech. , 365 - 407
    13. 13)
      • Parekh, D.E., Kibens, V., Glezer, A., Wiltse, J.M., Smith, D.M.: `Innovative jet flow control: mixing enhancement experiments', Paper 96-0308 presented at the AIAA Conf., 1996.
    14. 14)
    15. 15)
      • Gutmark, E.J., Parr, T.P., Wilson, K.J., Schadow, K.C.: `Active control in combustion systems with vortices', Proc. 4th IEEE Conf. on Control Applications, 1995, p. 679–684.
    16. 16)
      • E.J. Gutmark , F.F. Grinstein . Flow control with noncircular jets. Annu. Rev. Fluid Mech. , 239 - 272
    17. 17)
      • E. Loth . Numerical approaches for motion of dispersed particles, droplets and bubbles. Prog. Energy Combust. Sci. , 161 - 223
    18. 18)
    19. 19)
      • H. Suzuki , N. Kasagi , Y. Suzuki . Active control of an axisymmetric jet with distributed electromagnetic flap actuators. Exp. Fluids, Fluid Dyn. , 498 - 509
    20. 20)
      • Aamo, O.M., Balogh, A., Krstic, M.: `Optimal mixing by feedback in pipe flow', Presented at the IFAC World Congress, 2002, Barcelona.
    21. 21)
      • Mezić, I., Narayanan, S.: `Overview of some theoretical & experimental results on modeling and control of shear flows', Proc. 39th IEEE Conf. on Decision and Control, Sydney, Australia, 11–15 December 2000.
    22. 22)
      • Yuan, C.-C.: `Control of jet flow mixing and stabilization', 2002, PhD dissertation, University of California at San Diego, San Diego, CA.
    23. 23)
    24. 24)
    25. 25)
      • Akselvoll, K., Moin, P.: `Large eddy simulation of turbulence confined coannular jets and turbulent flow over a backward facing step', TF-63, Report, 1995.
    26. 26)
      • S.A. Stanley , S. Sarkar , J.P. Mellado . A study of the flow-field evolution and mixing in a planar turbulent jet using direct numerical simulation. J. Fluid Mech. , 377 - 407
    27. 27)
      • S. Lardeau , E. Lamballais , J.-P. Bonnet . Direct numerical simulation of a jet controlled by fluid injection. J. Turbul.
    28. 28)
      • T. Colonius , S.K. Lele , P. Moin . Boundary conditions for direct computation of aerodynamic sound generation. AIAA J. , 9 , 1574 - 1582
http://iet.metastore.ingenta.com/content/journals/10.1049/ip-cta_20041053
Loading

Related content

content/journals/10.1049/ip-cta_20041053
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Print this page
This is a required field
Please enter a valid email address