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Surface pressure and flow field behind an oscillating fence submerged in turbulent boundary layer

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Abstract

Phase-locked PSP and PIV measurements were used to study the evolution of three-dimensional disturbances produced by an oscillating fence actuator immersed in a zero pressure gradient turbulent boundary layer. For the single fence frequency studied, strong three-dimensionality is observed in the vortical structure that varies along the span of the fence soon after the fence enters the flow. At the midspan, the structure grows, weakens, and convects faster than at other locations. As the fence height increases, the data indicate that the vortical structure terminates near the edge of the fence. In contrast, the vortex structure terminates on the plate surface adjacent to the fence edge as the fence descends, similar to a wake vortex of a stationary obstacle. This study demonstrates that the combined use of surface and flow-field diagnostics provide a link between flow field and surface features, yielding an understanding of the flow that would have not been possible with any one technique.

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Acknowledgments

The authors would like to acknowledge the support of AFOSR under grant number F49620-03-1-0358 monitored by Dr. Dean Mook, Capt. Clark Allred, and Dr. Victor Giurgiutiu. The views and opinions of the authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Financial Support from International Centre of Excellence for Fluid Dynamics, Tohoku University, Japan for Man**der Singh’s visit to Tohoku University is also acknowledged.

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Authors and Affiliations

  1. Mechanical Engineering Department, Dept 3295, University of Wyoming, Laramie, WY, 82071, USA

    Man**der Singh & Jonathan W. Naughton

  2. Department of Aerospace Engineering, Tohoku University, Sendai, Japan

    Taro Yamashita, Hiroki Nagai & Keisuke Asai

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  1. Man**der Singh
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  2. Jonathan W. Naughton
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  3. Taro Yamashita
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  4. Hiroki Nagai
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  5. Keisuke Asai
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Correspondence to Man**der Singh.

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Singh, M., Naughton, J.W., Yamashita, T. et al. Surface pressure and flow field behind an oscillating fence submerged in turbulent boundary layer. Exp Fluids 50, 701–714 (2011). https://doi.org/10.1007/s00348-010-0977-y

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  • DOI: https://doi.org/10.1007/s00348-010-0977-y

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