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Flapping Motion of a Turbulent Jet Under the Asymmetric Excitation of Two Unsteady Minijets

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Fluid-Structure-Sound Interactions and Control

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

Abstract

The control of a turbulent round jet is experimentally investigated based on the injection of two radial minijets, separated azimuthally by an angle θ = 60º, prior to the issue of the main jet. It has been found that the asymmetric excitation increases the decay rate of the jet centerline mean velocity by 30 % or more than the symmetric (θ = 180º). A flapping motion of the jet column is found to be responsible for the substantially increased jet mixing.

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References

  • Davis MR (1982) Variable control of jet decay. AIAA J 20(5):606–609

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Acknowledgments

Y Zhou acknowledges the financial support from CSIRO Chief Executive Office through the Distinguished Visiting Scientist program, from Shenzhen Government Research Grants Council through grants JCYJ20120613134811717 and JCYJ20130402100505796, and from Research Grants Council of HKSAR through grant PolyU 5329/11E.

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Authors and Affiliations

  1. Institute for Turbulence-Noise-Vibration Interaction and Control, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China

    H. Yang & Y. Zhou

  2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong

    H. Yang & Y. Liu

  3. CSIRO Manufacturing Flagship, Private Bag 10, Clayton South MDC, Victoria, 3169, Australia

    Y. Zhou & Y. Zhu

Authors
  1. H. Yang
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  2. Y. Zhou
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  3. Y. Zhu
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  4. Y. Liu
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Corresponding author

Correspondence to Y. Zhou .

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Editors and Affiliations

  1. Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China

    Yu Zhou

  2. Curtin University, Bentley, Australia

    A.D. Lucey

  3. The Hong Kong Polytechnic University, Hong Kong, China

    Yang Liu

  4. The University of Hong Kong, Hong Kong, China

    Lixi Huang

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© 2016 Springer-Verlag Berlin Heidelberg

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Yang, H., Zhou, Y., Zhu, Y., Liu, Y. (2016). Flapping Motion of a Turbulent Jet Under the Asymmetric Excitation of Two Unsteady Minijets. In: Zhou, Y., Lucey, A., Liu, Y., Huang, L. (eds) Fluid-Structure-Sound Interactions and Control. Lecture Notes in Mechanical Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-48868-3_42

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  • DOI: https://doi.org/10.1007/978-3-662-48868-3_42

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-48866-9

  • Online ISBN: 978-3-662-48868-3

  • eBook Packages: EngineeringEngineering (R0)

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