Turbulent pipe flow response to wall changes targeting specific azimuthal modes

Tyler Van Buren, Leo H.O. Hellstrom, Ivan Marusic, Alexander J. Smits

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We present an experimental study on the response of turbulent pipe flow at Ret = 3486 to rapid changes in pipe shape that are designed to manipulate the Large Scale and Very Large Scale Motions in wall-bounded turbulence. Stereo PIV measurements were taken 5 pipe diameters downstream of 3D printed pipe inserts designed to target specific azimuthal Fourier mode numbers m = 3 and 15. Direct manipulation of the flow momentum (vortex generators) and secondary flows induced by Reynolds stresses (sinusoidally varying wall shape) are considered. The designs successfully modified the mean flow to contain structures mimicking the desired Fourier mode shapes. The energy was added directly to the targeted modes, and secondary peaks in energy existed in non-targeted modes indicating nonlinear interactions. At the same time, other modes showed relatively significant losses of energy, indicating that the pipe inserts were gathering energy into predefined flow structure.

Original languageEnglish (US)
Title of host publication10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PublisherInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP10
ISBN (Electronic)9780000000002
StatePublished - Jan 1 2017
Event10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 - Chicago, United States
Duration: Jul 6 2017Jul 9 2017

Publication series

Name10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Volume2

Other

Other10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
CountryUnited States
CityChicago
Period7/6/177/9/17

All Science Journal Classification (ASJC) codes

  • Atmospheric Science
  • Aerospace Engineering

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  • Cite this

    Van Buren, T., Hellstrom, L. H. O., Marusic, I., & Smits, A. J. (2017). Turbulent pipe flow response to wall changes targeting specific azimuthal modes. In 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 (10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017; Vol. 2). International Symposium on Turbulence and Shear Flow Phenomena, TSFP10.