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Numerical modeling of internal flow in a fluidic oscillator

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Abstract

A numerical investigation of a fluidic oscillator was performed to understand the unsteady internal flow field and geometrical effects on the performance using three-dimensional unsteady Reynolds-averaged Navier-Stokes equations. Effects of the two geometrical parameters, i.e., the inlet width of the mixing chamber and outlet throat width, on peak jet velocity ratio at the exit and pressure drop through the oscillator, were evaluated. The unsteady simulation was performed using shear stress transport turbulence model with air as working fluid at Reynolds number 30000. Computational results showed good qualitative and quantitative agreements with available experimental results for the flow structure and frequency of the oscillating jet. Results of the parametric study suggested that the inlet width affected significantly the flow in the fluidic oscillator, while effects of the throat width on the performance parameters were not remarkable.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Inha University, Incheon, 22212, Korea

    Raunak Jung Pandey & Kwang-Yong Kim

Authors
  1. Raunak Jung Pandey
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  2. Kwang-Yong Kim
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Corresponding author

Correspondence to Kwang-Yong Kim.

Additional information

This paper was presented at the ICCHM2T2017, Sejong Hotel, Seoul, Korea, May 28–June 1, 2017. Recommended by Guest Editor Heuy Dong Kim.

Raunak Jung Pandey received his bachelor’s degree in mechanical engineering from Kathmandu University in 2014. He is currently pursuing his research toward M.S. degree in thermodynamics and Fluid Mechanics at Inha University. His research interest is in fluidic oscillator.

Kwang-Yong Kim received his B.S. degree from Seoul National University in 1978, and his M.S. and Ph.D. degrees from the Korea Advanced Institute of Science and Technology (KAIST), Korea, in 1981 and 1987, respectively. He is currently a Dean of Engineering College and a Professor in the Department of Mechanical Engineering of Inha University, Incheon, Korea. Professor Kim is also the current Editor-in-Chief of the International Journal of Fluid Machinery and Systems, the Associate Editor of ASME Journal of Fluids Engineering, and the Chairman of the Asian Fluid Machinery Committee. He served as the Editor-in-Chief of the Transactions of Korean Society of Mechanical Engineers and President of Korean Society for Fluid Machinery. He is also a fellow of the Korean Academy of Science and Technology, a fellow of the American Society of Mechanical Engineers (ASME), an associate fellow of the American Institute of Aeronautics and Astronautics (AIAA), and a recipient of order of science and technology merit, “Doyak medal” from Republic of Korea.

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Pandey, R.J., Kim, KY. Numerical modeling of internal flow in a fluidic oscillator. J Mech Sci Technol 32, 1041–1048 (2018). https://doi.org/10.1007/s12206-018-0205-x

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  • DOI: https://doi.org/10.1007/s12206-018-0205-x

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