Canonical boundary layer properties at high Reynolds number as measured in the UNH Flow Physics Facility

ORAL

Abstract

This presentation describes the characteristics of the flow within the Flow Physics Facility (FPF) at the University of New Hampshire. Having a test section length of 72m, the FPF employs the ``big and slow'' solution to obtaining well-resolved turbulent boundary layer measurements at high Reynolds number. We report on experiments that investigate the wind speed and Reynolds number capability, spanwise uniformity, streamwise pressure gradient, and free-stream turbulence intensity in the FPF. Single element hot-wire measurements of the boundary layer statistical profiles (up to fourth central moment) are presented. These experiments used standard 1mm sensors to generate spatially and temporally well-resolved measurements over the Karman number range 2000 - 20000. Integral parameters and spectra, at a variety of stream-wise locations and Reynolds numbers, are presented, and compared to existing data. For a wide range of test conditions, the FPF is shown to provide high-resolution access to the turbulence of the canonical boundary layer at high Reynolds number.

Authors

  • Paschal Vincenti

    University of New Hampshire

  • Caleb Morrill-Winter

    University of New Hampshire

  • Joseph Klewicki

    University of New Hampshire, Department of Mechanical Engineering, University of New Hampshire \& Department of Mechanical Engineering, University of Melbourne, University of New Hampshire and University of Melbourne

  • Christopher White

    University of New Hampshire

  • Martin Wosnik

    University of New Hampshire