15th European Turbulence Conference 2015
August 25-28th, 2015, Delft, The Netherlands
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WALL-SHEAR STRESS MEASUREMENTS OF TURBULENT FLOW OVER RIBBED SURFACES USING THE MICRO-PILLAR SHEAR STRESS SENSOR MPS3


Go-down etc15 Tracking Number 90

Presentation:
Session: Control 1
Room: Room D
Session start: 10:30 Tue 25 Aug 2015

Yiou Liu   y.liu@aia.rwth-aachen.de
Affifliation: Institute of Aerodynamics, RWTH Aachen University, Aachen, Germany
Wenfeng Li   wf.li@aia.rwth-aachen.de
Affifliation: Institute of Aerodynamics, RWTH Aachen University, Aachen, Germany
Wilheim Jessen   w.jessen@aia.rwth-aachen.de
Affifliation: Institute of Aerodynamics, RWTH Aachen University, Aachen, Germany
Michael Klaas   m.klaas@aia.rwth-aachen.de
Affifliation: Institute of Aerodynamics, RWTH Aachen University, Aachen, Germany
Wolfgang Schroeder   office@aia.rwth-aachen.de
Affifliation: Institute of Aerodynamics, RWTH Aachen University, Aachen, Germany

Topics: - Control of turbulent flows, - Wall bounded flows

Abstract:

The drag reduction effect of a semi-circular riblet-structured surface in a turbulent boundary layer is experimentally investigated using the micro-pillar shear stress sensor MPS3. The MPS3 sensor is a novel tool for the quantitative measurement of the wall-shear stress distribution and possesses a high spatial and temporal resolution. The effectiveness and mechanisms of a ribbed surface in skin friction reduction are to be examined in comparison with the flow case of a flat surface.