Numerical Study of the Compressible Air Flow Through a Two-output Fluidic Oscillator

Document Type : Regular Article

Authors

Theoretical and Applied Fluid Mechanics Laboratory, Faculty of Physics, University of Science and Technology Houari Boumediene, Bab Ezzaouar, Algiers, 16111, Algeria

10.47176/jafm.18.4.3128

Abstract

This paper investigates the dynamic internal flow structure, and its outlet jets, of the fluidic oscillator. The objective of this numerical study is to provide a better understanding of this type of jet for a research domain aimed at improving various aspects of fluid flow control. The present work focuses on the two-output fluidic oscillator, which involves no moving parts in direct contact with the flow. An analysis of the internal and external dynamics of the two-output fluidic oscillator using numerical simulations for compressible air flow was investigated by employing the  SST turbulence model. The study highlights the periodic oscillation of the jet inside the fluidic oscillator between the two branches driven by the Coanda effect, which characterizes the oscillatory behavior of the fluidic oscillator. Furthermore, it reveals the importance of controlling the inlet pressure to maintain the oscillatory behavior. The results demonstrate that the outlet velocity is influenced by the inlet conditions as well as the system's geometry. In conclusion, the article provides essential insights into the dynamics of the two-output fluidic oscillator, emphasizing the impact of physical and geometrical control parameters on flow behavior.

Keywords

Main Subjects

References

Ansys. (2014). Ansys Fluent Theory Guide. Ansys, Inc.
Aram, S., Lee, Y. T., Shan, H., & Vargas, A. (2018, January). Computational fluid dynamic analysis of fluidic actuator for active flow control applications. AIAA Journal, 56, 111–120. https://doi.org/10.2514/1.j056255
Campagnuolo, C. J., & Henry, L. C. (1969). Review of some fluid oscillators. Tech. rep., Harry Diamond Laboratories.
Cerretelli, C., & Gharaibah, E. (2007, June). An Experimental and numerical investigation on fluidic oscillators for flow control. 37th AIAA Fluid Dynamics Conference and Exhibit. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2007-3854
Gaertlein, S., Woszidlo, R., Ostermann, F., Nayeri, C., & Paschereit, C. O. (2014, January). The time-resolved internal and external flow field properties of a fluidic oscillator. 52nd Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2014-1143
Löffler, S., Ebert, C. & Weiss, J. (2021, April). Fluidic-oscillator-based pulsed jet actuators for flow separation control. Fluids, 6, 166. https://doi.org/10.3390/fluids6040166
Menter, F. R. (1994, August). Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 32, 1598–1605. https://doi.org/10.2514/3.12149
Milton, L. (1968). Evaluation of a fluidic oscillator as a molecular weight sensor for gas mixtures. Tech. rep., NASA Technical Memorandum.
Ostermann, F., Woszidlo, R., Nayeri, C., & Paschereit, C. O. (2015, January). experimental comparison between the flow field of two common fluidic oscillator designs. 53rd AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2015-0781
Otto, C., Tewes, P., Little, J. C., & Woszidlo, R. (2019, December). Comparison between fluidic oscillators and steady jets for separation control. AIAA Journal, 57, 5220–5229. https://doi.org/10.2514/1.j058081
Park, S., Ko, H., Kang, M., & Lee, Y. (2020, June). Characteristics of a supersonic fluidic oscillator using design of experiment. AIAA Journal, 58, 2784–2789. https://doi.org/10.2514/1.j058968
Samsam-Khayani, H., Mohammadshahi, S., & Kim, K. C. (2020, December). Experimental study on physical behavior of fluidic oscillator in a confined cavity with sudden expansion. Applied Sciences, 10, 8668. https://doi.org/10.3390/app10238668
Seo, J. H., Zhu, C., & Mittal, R. (2018, June). Flow physics and frequency scaling of sweeping jet fluidic oscillators. AIAA Journal, 56, 2208–2219. https://doi.org/10.2514/1.j056563
Simões, E. W., Furlan, R., Bruzetti Leminski, R. E., Gongora-Rubio, M. R., Pereira, M. T., Morimoto, N. I., & Santiago Avilés, J. J. (2005, March). Microfluidic oscillator for gas flow control and measurement. Flow Measurement and Instrumentation, 16, 7–12. https://doi.org/10.1016/j.flowmeasinst.2004.11.001
Song, J., Wang, S., Qiu, Z., Peng, D., Liu, Y. & Wen, X. (2024, March). Flow mechanism study and geometrical parameters analysis of fluidic oscillators based on pressure-sensitive paint measurements and moda analysis. Experiments in Fluids, 65, 38. https://doi.org/10.1007/s00348-024-03773-5
Wang, S. (2017, September). Experimental and numerical study of micro-fluidic oscillators for flow separation control. [Theses, INSA de Toulouse]. Retrieved from https://theses.hal.science/tel-01710768
Wang, S., Baldas, L., Colin, S., Orieux, S., Kourta, A., & Mazellier, N. (2016, June). Experimental  and numerical study of the frequency response of a fluidic oscillator for active flow control. 8th AIAA Flow Control Conference. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2016-4234
Wang, S., Batikh, A., Baldas, L., Kourta, A., Mazellier, N., Colin, S., & Orieux, S. (2019, November). On the modelling of the switching mechanisms of a Coanda fluidic oscillator. Sensors and Actuators A: Physical, 299, 111618. https://doi.org/10.1016/j.sna.2019.111618
Wesfreid, J. E., Zielinska, B. J., Maurel, A., Ern, P., & Bouchet, G. (1994, October). Oscillateur fluidique : application à la débitmétrie des écoulements monophasiques. La Houille Blanche, 80, 99–104. https://doi.org/10.1051/lhb/1994084
Woszidlo, R., Ostermann, F., Nayeri, C. N., & Paschereit, C. O. (2015, June). The time-resolved natural flow field of a fluidic oscillator. Experiments in Fluids, 56. https://doi.org/10.1007/s00348-015-1993-8

Files

History

  • Received: 23 September 2024
  • Revised: 17 November 2024
  • Accepted: 01 December 2024
  • Available online: 04 February 2025

Share

How to cite

Statistics