Experiments in Fluids

, Volume 8, Issue 6, pp 301-311

First online:

Turbulent flow visualization by interferometric integral imaging and computed tomography

  • D. W. WattAffiliated withDept. of Mechanical Engineering, University of New Hampshire
  • , C. M. VestAffiliated withDept. of Mechanical Engineering, The University of Michigan

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An experimental system using integral interferometric imaging and computer tomography for visualizing the structure of a turbulent, vertical helium jet is described. Integral images and tomographic integral data were obtained using a pulsed phase-shifted interferometer. The integral images revealed a sinuous overall jet structure and large-scale buckling motions in the far-field. Tomographic reconstruction of jet cross-sections at numerous axial locations were made for three turbulent jets at two different Reynols numbers, 2,800 and 4,300. Tomographic images revealed unmixed ambient fluid far inside the jet boundary and a bimodal concentration distribution. Image interpretation and experimental errors are discussed.