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IUTAM Symposium on Laminar-Turbulent Transition pp 287–292Cite as

THE EFFECT OF LENGTH SCALE OF FREE STREAM TURBULENCE ON BOUNDARY LAYER TRANSITION

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Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 78))

Abstract

The present experiment focused on revealing effect of scale and directional component of free stream turbulence on boundary layer transition, especially growth rate of disturbance energy in the boundary layer. The free stream turbulence generated by a turbulence grid mounted upstream of the contraction has typical character of axisymmetric turbulence with strong anisotropy. The experimental results with anisotropic free stream turbulence show the non-modal growth disturbance even at 0.7 % turbulence intensity. The correlation between the filtered free stream fluctuation and growth rates of the disturbance in the boundary layer suggests that the wall-normal velocity fluctuation in the free stream dominates the disturbance growth.

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REFERENCES

  1. M. Matsubara and P. H. Alfredsson. Disturbance growth in boundary layers subjected to free-stream turbulence. J.Fluid Mech., 430: 149-168, 2001.

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  4. P. Luchini. Reynolds-number-independent instability of the boundary layer over a flat surface: optimal perturbations. J.Fluid Mech., 404: 289-309, 2000.

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Author information

Authors and Affiliations

  1. Shinshu University, Nagano, Japan

    Toshiaki Kenchi & Masaharu Matsubara

Authors
  1. Toshiaki Kenchi
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  2. Masaharu Matsubara
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Editor information

Editors and Affiliations

  1. Jawaharlal Nehru Centre for Advanced Scientific Research, Engineering Mechanics Unit, Bangalore, India

    Rama Govindarajan

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© 2006 Springer

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Cite this paper

Kenchi, T., Matsubara, M. (2006). THE EFFECT OF LENGTH SCALE OF FREE STREAM TURBULENCE ON BOUNDARY LAYER TRANSITION. In: Govindarajan, R. (eds) IUTAM Symposium on Laminar-Turbulent Transition. Fluid Mechanics and Its Applications, vol 78. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4159-4_39

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  • DOI: https://doi.org/10.1007/1-4020-4159-4_39

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-1-4020-3459-6

  • Online ISBN: 978-1-4020-4159-4

  • eBook Packages: EngineeringEngineering (R0)

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