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Parameter influence on the evolution of low-aspect-ratio rectangular synthetic jets

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Abstract

The evolution of low-aspect-ratio rectangular synthetic jets is investigated with dye and laser-induced-fluorescence (LIF) flow visualization techniques. This paper analyzes the impacts of three key parameters on the evolution of vortical structures, respectively, including orifice aspect-ratio (AR), dimensionless stroke length, and Reynolds number. Compared with circular synthetic jet, all the rectangular synthetic jets display vortex ring axis switching, and may develop into two types of stream-wise vortices I and II. The evolution of the vortex ring and the generation of stream-wise vortices are influenced by three parameters. In particular, stream-wise vortices are not detected for a low AR, stroke length or Reynolds number case.

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Acknowledgements

This work was supported by the Sino-German Center for Research Promotion (No. GZ1280), and the Fundamental Research Funds for the Central Universities of China (Nos. YWF-16-BJ-Y-06 and YWF-16-JCTD-A-05).

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Authors and Affiliations

  1. Fluid Mechanics Key Laboratory of Education Ministry, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China

    Lei Wang, Li-Hao Feng, Jin-Jun Wang & Tian Li

  2. Shenyang Aircraft Design and Research Institute, Shenyang, 110035, China

    Tian Li

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  1. Lei Wang
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  2. Li-Hao Feng
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  3. Jin-Jun Wang
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  4. Tian Li
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Correspondence to Li-Hao Feng.

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Wang, L., Feng, LH., Wang, JJ. et al. Parameter influence on the evolution of low-aspect-ratio rectangular synthetic jets. J Vis 21, 105–115 (2018). https://doi.org/10.1007/s12650-017-0440-8

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