Adverse Pressure Gradient Boundary Layer Experiments Using Synchronized PIV and a Hot Wire Anemometry Rake

ORAL

Abstract

This is the first report of an adverse pressure gradient turbulent boundary layer experiment performed in Laboratoire de M\'{e}canique de Lille, LML, wind tunnel which is of 20 meter in length. The adverse pressure gradient was created by means of a bump of 30 cm height. The thickness of the boundary layer was about 30 cm and Reynolds number based on momentum thickness, Re$_{\theta}$, was 30 000 for 10 m/s external free stream velocity. A hot wire rake of 143 probes synchronized and simultaneously sampled together with 2 stereo PIV systems in the wallnormal-spanwise (YZ) plane, 1 cm upstream of the wires plane, and 1 stereo PIV system to record in the streamwise-wallnormal (XY) plane. One high repetition PIV system was used in streamwise-spanwise (XZ) plane with sampling frequency of 3000 VF/s and also at a slower rate simultaneously with hot wire signal.

*This work has been performed under the WALLTURB project. WALLTURB (A European synergy for the assessment of wall turbulence) is funded by the CEC under the 6th framework program (CONTRACT N°: AST4-CT-2005-516008)

Authors

  • P.B.V. Johansson

  • M. Tutkun

  • William K. George

    • Chalmers University of Technology, Dept. of Applied Mechanics, 412 96 Goteborg Sweden
    • Chalmers University of Tech.
  • M. Stanislas

  • J.M. Foucaut

  • J. Kostas

  • S. Coudert

    • Laboratoire de Mecanique de Lille, UMR CNRS 8107, 59655 Villeneuve d'Ascq France
  • J. Delville

    • Laboratoire d'Etudes Aerodynamiques, UMR CNRS 6609, 86036 Poitiers France