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Streamwise and Radial Decomposition of a Turbulent Axisymmetric Jet

  • Maja Wänström
  • William K. George
  • K. E. Meyer
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

Planar PIV was used to acquired 10, 000 independent samples of the far field of a free, turbulent round air jet flow of exit Reynolds number 20,000. The objective was to test the two-point similarity theory of Ewing et al. [1]. After applying the similarity mapping, two-point velocity correlation analysis showed independence of streamwise origin, confirming the hypothesized streamwise homogeneity in two-point similarity coordinates. The velocity data was subsequently spatially decomposed by applying Fourier transformation in the ‘homogenized’ streamwise direction and POD to obtain orthogonal basis functions in the radial direction.

Keywords

Particle Image Velocimetry Centerline Velocity Downstream Position Virtual Origin Orthogonal Basis Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Ewing, D., Frohnapfel, B., George, W.K., Pedersen, J.M., Westerweel, J.: Two-point similarity in the round jet. Journal of Fluid Mechanics 557, 309–330 (2007)MathSciNetCrossRefGoogle Scholar
  2. 2.
    Wänström, M.: Spatial Decompositions of a Fully Developed Turbulent Jet Sampled with Particle Image Velocimetry. Ph.D. diss., Chalmers U. of Tech., Gothenburg, Sweden (2009), http://www.turbulence-online.com

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Maja Wänström
    • 1
  • William K. George
    • 2
  • K. E. Meyer
    • 3
  1. 1.Swedish Energy AgencyEskilstunaSweden
  2. 2.EC Lille, LMLU. Lille Nord de FranceVilleneuve d AscqFrance
  3. 3.Dept. Mech. Engr.Technical University of DenmarkLyngbyDK

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