Shear stress measurements by Preston tubes

  • Vega, Aitor (UniOvi)
  • Miguel, Celia (ArcelorMIttal)
  • Rodríguez, Alejandro (ArcelorMIttal)
  • Pereiras, Bruno (UniOvi)

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This work deals with some problems found by the authors when using Preston tubes for measuring shear stress in planar jets. In spite of the well-known underestimation of the maximum shear stress made by the Preston tubes, they have revealed as a reliable way to make the measurements, predicting the location of the maximum shear stress and being accurate out of this location. However, many problems were reported before reaching successful test campaigns. Those are related in this work.