Skip to main content
SpringerLink
Log in

Assessment of two fluidic actuators for active flow control on a one-sided diffuser

A modal analysis

  • Original Paper
  • Published:
CEAS Aeronautical Journal Aims and scope Submit manuscript

Abstract

The manipulated flow along a one-sided diffuser is investigated experimentally by means of particle image velocimetry and wall pressure measurements. Two fluidic actuators are considered: a fluidic diverter emitting two alternately pulsed jets and a fluidic oscillator generating one spatially oscillating jet. Active separation control is performed with these devices to suppress the pressure-induced separation bubble present in the uncontrolled flow field. The method of proper orthogonal decomposition is employed to identify inherent physical mechanisms subject to varied jet emission angles as well as actuation intensities and construct a reduced order model by utilizing modal coefficients to obtain phase information regarding the periodic actuation process. As a main result, we show that longitudinal vortex structures determining the separation control capability, are more distinct for the fluidic oscillator. Furthermore, the flow fields manipulated by both actuators at a low momentum input are dominated by a spatial mode resembling the base flow. However, this feature is suppressed by the fluidic diverter at greater velocity ratios, whereas the variation of actuation intensity does not yield significant alterations to the spatial modes observed for the fluidic oscillator.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Fig. 23
Fig. 24

Similar content being viewed by others

References

  1. Ball, W.H.: Tests of wall blowing concepts for diffuser boundary layer control. In: 20th Joint Propulsion Conference (1984)

  2. Bauer, M., Lohse, J., Haucke, F., Nitsche, W.: High-lift performance investigation of a two-element configuration with a two-stage actuator system. AIAA J. 52(6) (2014)

  3. Cuvier, C., Braud, C., Foucaut, J.M., Stanislas, M.: Flow control over a ramp using active vortex generators. In: 7th International Symposium on Turbulence and Shear Flow Phenomena (2011)

  4. Greenblatt, D., Wygnanski, I.J.: The control of flow separation by periodic excitation. AIAA J. 36, 487–545 (2000)

    Google Scholar 

  5. Gregory, J.W., Tomac, M.N.: A review of fluidic oscillator development and application for flow control. In: 43rd Fluid Dynamics Conference, AIAA (2013)

  6. Guyot, D., Bobusch, B., Paschereit, C.O., Raghu, S.: Active combustion control using a fluidic oscillator for asymmetric fuel flow modulation. In: Proceedings of the 44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit (2008)

  7. Hecklau, M., Salazar, D.P., Nitsche, W.: Influence of the actuator jet angle on the reattachment process with pulsed excitation. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 121 (2010)

  8. Hossain, M.A., Prenter, R., Lundgreen, R.K., Ameri, A., Gregory, J.W., Bons, J.P.: Experimental investigation of sweeping jet film cooling. In: Proceedings of ASME Turbo Expo 2017, Turbomachinery Technical Conference and Exposition (2017)

  9. Hunt, J.C.R., Wray, A.A., Moin, P.: Eddies, stream, and convergence zones in turbulent flows. In: Center for Turbulence Research Report CTR-S88 (1988)

  10. Joseph, P., Bortolus, D., Grasso, F.: Flow control on a 3D backward facing ramp by pulsed jets. C. R. Mecanique 342(6-7) (2014)

  11. Kumar, V., Alvi, F.S.: Use of high-speed microjets for active separation control in diffusers. AIAA J. 44(2) (2006)

  12. Lenkins, L., Gorton, S.A., Anders, S.: Flow control device evaluation for an internal flow with an adverse pressure gradient. In: 40th AIAA Aerosp. Sci. Meet. Exhibit (2002)

  13. Lumley, J.L.: Stochastic Tools in Turbulence. Academic, New York (1970)

    MATH  Google Scholar 

  14. Perrin, R., Braza, M., Cid, E., Cazin, S., Barthet, A., Sevrain, A., Mockett, C., Thiele, F.: Phase averaged turbulence properties in the near wake of a circular cylinder at high Reynolds number using POD. In: 13th Int Symp on Applications of Laser Techniques to Fluid Mechanics (2006)

  15. Phillips, E., Woszidlo, R., Wygnanski, I.: Separation control on a dynamic trailing-edge flap. In: AIAA 5th Flow Control Conference (2010)

  16. Raghu, S.: Fluidic oscillators for flow control. Exp. Fluids 54(2) (2013)

  17. Sirovich, L.: Turbulence and the dynamics of coherent structures. Part I: Coherent structures. Quart. Appl. Math. 45(3) (1987)

  18. Song, S., DeGraaff, D.B., Eaton, J.K.: Experimental study of a separating, reattaching, and redeveloping flow over a smoothly contoured ramp. J. Heat Fluid Fl. 21(5) (2000)

  19. Viswanath, P.R., Ramesh, G., Madhavan, K.T.: Separation control by tangential blowing inside the bubble. Exp. Fluids 29(1) (2000)

Download references

Author information

Authors and Affiliations

  1. Technische Universität Berlin, Berlin, Germany

    B. Steinfurth, F. Haucke & J. Weiss

Authors
  1. B. Steinfurth
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. F. Haucke
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. J. Weiss
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to B. Steinfurth.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Steinfurth, B., Haucke, F. & Weiss, J. Assessment of two fluidic actuators for active flow control on a one-sided diffuser. CEAS Aeronaut J 10, 633–643 (2019). https://doi.org/10.1007/s13272-018-0336-x

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s13272-018-0336-x

Keywords

Search

Navigation