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Analysis of Interaction Between Oscillating Jet Issuing from a Fluidic Oscillator and a Crossflow

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Abstract

In the present study, numerical simulation was conducted to study both the internal and external flows of a fluidic oscillator in a quiescent environment and with a crossflow. Unsteady Reynolds-averaged Navier–Stokes analysis was used to evaluate the flow field. The blowing ratio was varied to understand the interaction between the free stream and the oscillating jet. Results for the time-averaged and the time-resolved flow fields were presented. The outlet velocity from the oscillator was not affected by the freestream flow for the tested three blowing ratios. Q criterion was used to evaluate the interaction of turbulent vortical structures from the fluidic oscillator with the crossflow. It was observed that two counter-rotating vortices and ring-like vortices were the important flow features of the external flow. As blowing ratio increases, the counter-rotating vortices become more asymmetric, move further from the wall, and are more spread.

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Acknowledgements

This work was supported by the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information with supercomputing resources including technical support (KSC-2017-C1-0010).

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  1. Department of Mechanical Engineering, Inha University, 100 Inha-Ro, Michuhol-Gu, Incheon, 22212, Republic of Korea

    Raunak Jung Pandey, Sang-Hyuk Kim & Kwang-Yong Kim

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  1. Raunak Jung Pandey
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  2. Sang-Hyuk Kim
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Correspondence to Kwang-Yong Kim.

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Pandey, R.J., Kim, SH. & Kim, KY. Analysis of Interaction Between Oscillating Jet Issuing from a Fluidic Oscillator and a Crossflow. Int. J. Aeronaut. Space Sci. 22, 255–263 (2021). https://doi.org/10.1007/s42405-020-00313-3

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